{"id":792,"date":"2020-05-12T16:02:24","date_gmt":"2020-05-12T21:02:24","guid":{"rendered":"https:\/\/www.lg-outdoors.com\/blog\/?p=792"},"modified":"2020-05-27T11:35:26","modified_gmt":"2020-05-27T16:35:26","slug":"rifle-accuracy-with-different-loads-by-boddington","status":"publish","type":"post","link":"https:\/\/www.lg-outdoors.com\/blog\/rifle-accuracy-with-different-loads-by-boddington\/","title":{"rendered":"RIFLE ACCURACY WITH DIFFERENT LOADS\u00a0\u00a0By\u00a0Craig Boddington\u00a0"},"content":{"rendered":"

Today\u2019s factory rifles are, on average, more accurate than I thought possible when I started shooting. American hunters and rifle shooters have long been obsessed with raw accuracy, probably more today than ever before because of the growing fascination with long-range shooting. How much accuracy is really needed depends entirely on what you intend to do. Bench-rest and thousand-yard competitors need all they can get, and so do varmint hunters. <\/span>M<\/span>ost big-game hunters probably have more accuracy than is truly necessary\u2014but it\u2019s a wonderful confidence builder to know that your rifle is capable of producing teeny, tiny groups!<\/span>\u00a0<\/span><\/p>\n

\"257<\/a>
257 Roberts group: There\u2019s no telling exactly what load a given rifle will shoot best\u2026and it may not be the load you prefer to use. So far, Boddington\u2019s Dakota .257 Roberts produces its best groups with Remington 100-grain round-nose Core-Lokt, not the most ideal hunting load for a flat-shooting cartridge. This rifle needs handloading and will get it!<\/figcaption><\/figure>\n

That\u2019s a<\/span>\u00a0<\/span>valid reason to demand<\/span>\u00a0extreme accuracy\u2014and it\u2019s amazing how many of today\u2019s basic, inexpensive factory rifles deliver.<\/span>\u00a0I think this is because, with modern manufacturing, factory tolerances are tighter than ever, with more consistent barrels.<\/span>\u00a0<\/span>When I<\/span>\u00a0was<\/span>\u00a0a kid<\/span>,<\/span>\u00a0we figured\u00a0<\/span>a factory bolt-action that produced 1.5-inch 100-yard groups was pretty darned good. Rifles\u00a0<\/span>shooting one inch and better were cause for bragging<\/span>.<\/span>\u00a0<\/span>Today it\u2019s amazing how many factory bolt guns retailing for less than $500 will consistently produce one-inch 100-yard groups.<\/span>\u00a0<\/span><\/p>\n

<\/span><\/p>\n

L<\/span>et me be clear:<\/span>\u00a0A<\/span>\u00a0\u201cone-inch, 100-yard group\u201d is neither a goal nor a standard.\u00a0<\/span>If you\u2019re a deer hunter, that\u2019s probably more than you need. If you\u2019re a prairie dog shooter, not good enough!\u00a0<\/span>However, with hunting rifles, we\u2019re pretty proud of one-inch 100-yard groups<\/span>. Not so long ago, to ensure such groups and hopefully<\/span>\u00a0cut them in half<\/span>, I figured the most likely path<\/span>\u00a0was to start with a good action and add a $500 match-grade barrel from a known maker. Today many sub-$500 factory rifles will do that right out of the box. However, not all\u00a0<\/span>will shoot that well!<\/span>\u00a0<\/span><\/p>\n

\"Barrel<\/a>
Barrel blanks: Barrel blanks, ready to be turned and chambered. Barrels are more consistent than ever, but no two are exactly alike, with microscopic differences. Boddington believes this is why no two seemingly identical barrels shoot differently with various loads.<\/figcaption><\/figure>\n

F<\/span>actory rifles are a lot like Forrest Gump\u2019s box of chocolates: You don\u2019t know what you\u2019re going to get! So, you open the box of chocolates, grab some ammo, and head for the range. Maybe you get lucky\u2026and maybe you don\u2019t. There\u2019s no way to know until you get to the range and shoot some groups.<\/span><\/p>\n

Modern factory rifles are so consistent that chances are good you will get groups you can live with if you must.\u00a0<\/span>S<\/span>hooters being demanding, and having read too much about modern accuracy, chances are equally good that you\u2019d like a little bit better<\/span>!<\/span>\u00a0<\/span><\/p>\n

\"Bench:<\/a>
Bench: When testing loads, it\u2019s critical to remove the human error. Make sure the rest and the bench are dead steady. Wait for a calm day and take your time.<\/figcaption><\/figure>\n

When I was a kid, the standard answer to improve accuracy was to start hacking on the bedding. This can be an answer but bedding is about\u00a0<\/span>keeping<\/span>\u00a0barrel vibration<\/span>\u00a0<\/span>consistent from shot to shot.\u00a0<\/span>Most factory rifles today have free-floated barrels, which is really absence of bedding; the barrel vibrates as it will.<\/span>\u00a0<\/span><\/p>\n

Today\u2019s accuracy is aided by the best and most consistent factory ammunition ever manufactured, and with the greatest variety. However, since 1873 any self-contained center-fire metallic cartridge is based on four components: Case, primer, propellant, and bullet. <\/span>A<\/span>ny factory cartridge is\u00a0<\/span>just<\/span> one assembly of these four components. A hand-loader can vary these components infinitely: Different brands of cases, which vary slightly in internal dimensions and weight; different <\/span>primers<\/span>; any of several dozen propellants\u00a0<\/span>and charge weights<\/span>; and bullets of different brands, styles, shapes, and weights.\u00a0<\/span>H<\/span>and-loader<\/span>s<\/span> can go even farther, varying bullet seating depth, and checking cases and bullets for consistency.<\/span><\/p>\n

\"Clean<\/a>
Clean on range: Boddington prefers to clean on the range. Everyone has their own protocol, but frequent cleaning is essential when breaking in a new barrel.<\/figcaption><\/figure>\n

U<\/span>nless you seek<\/span>\u00a0<\/span>bench-rest accuracy, it usually isn\u2019t necessary to go quite this far. However, some rifles are forgiving and accepting<\/span>. Others<\/span>\u00a0are finicky<\/span>,<\/span>\u00a0<\/span>and<\/span>\u00a0most\u00a0<\/span>will deliver somewhat better accuracy with\u00a0<\/span>certain<\/span>\u00a0loads.\u00a0<\/span>Shooters of factory ammo<\/span>\u00a0are<\/span>\u00a0at a disadvantage because ammo is expensive, and if a given load shoot<\/span>s\u00a0<\/span>badly,<\/span>\u00a0<\/span>you\u2019re stuck with a partial box (like my garage is full of). However,<\/span> whether you hand-load or shoot factory ammo, the best way to<\/span>\u00a0discover<\/span>\u00a0the accuracy your rifle is capable of is to vary the loads\u2014as\u00a0<\/span>much<\/span>\u00a0as possible.<\/span>\u00a0<\/span><\/p>\n

\"When<\/a>
When shooting groups, pay attention to technique, especially trigger press. The idea is to remove as much human element as possible. If conditions are poor\u2014too hot, cold, or windy\u2014or if you\u2019re jumpy or tired, you\u2019re just wasting expensive ammo.<\/figcaption><\/figure>\n

With popular cartridges, such as <\/span>223 Remington<\/span><\/a>, 270 Winchester<\/a>, 308 Winchester<\/a>, 30-06 Springfield<\/a>, and <\/span>300 Win Mag<\/a><\/span>,\u00a0factory load options number into the hundreds.\u00a0<\/span>It would cost a fortune to try them all<\/span>!<\/span>\u00a0However, over time, you can<\/span>\u00a0<\/span>try different brands loaded with different weights and\u00a0<\/span>styles of bullets.<\/span>\u00a0I use all of the cartridges just mentioned,<\/span>\u00a0but<\/span>\u00a0I have a penchant for\u00a0<\/span>older, less popular cartridges<\/span>, such as <\/span>257 Roberts<\/a><\/span>, 264 Winchester Magnum<\/a><\/span>, and <\/span>300 H&H<\/a><\/span>. There are few factory options and, lacking popularity, there has been little\u00a0<\/span>load development.\u00a0<\/span>To optimize accuracy, you just about have to hand-load<\/span>\u00a0for \u201cunpopular cartridges\u201d \u2026<\/span>or accept<\/span>\u00a0the accuracy you get from the small selection of factory loads<\/span>!<\/span>\u00a0<\/span><\/p>\n

\"Crown<\/a>
Crown recut: This inexpensive Remington .30-06 turned out to have a lop-sided crown, right group. We re-cut the crown at the range, a simple process (if you have the tools). Using the same factory ammo, it turned into a real tack-driver, center group.<\/figcaption><\/figure>\n

I<\/span>t\u2019s a trial-and-error business<\/span>: There is no predicting exactly what\u00a0<\/span>load\u00a0<\/span>a given rifle might prefer. Note, too, that the \u201cmost accurate\u201d loads may not be the loads you would prefer to use! The 7mms and .30-calibers are available in a wide range of bullet weights. In my experience, few rifles in either bore diameter<\/span>\u00a0shoot equally well with both lighter and heavier bullets, such as 140 and 175-grain 7mm bullets; and 150 and 200-grain .30-caliber bullets. With a new rifle, I tend to start with medium-weight bullets, such as 165-grain .30-calibers and 150-grain 7mm. If accuracy isn\u2019t\u00a0<\/span>acceptable,<\/span>\u00a0I\u2019ll try both lighter and heavier bullets and see what happens.<\/span>\u00a0<\/span><\/p>\n

Bullet brand, style, and\u00a0<\/span>construction<\/span><\/i>\u00a0can make a huge difference. Some barrels shoot<\/span>\u00a0\u201ccopper\u201d bullets (Barnes X, GMX, etc.)<\/span>\u00a0very well, but others show a marked preference for lead-core bullets.\u00a0<\/span>And some are just the reverse.<\/span>\u00a0<\/span><\/p>\n

\"Crown:<\/a>
Crown: The crown is the last thing that the bullet touches as it exits and it must be concentric. Crowns are easily chipped (often by muzzle-down carry in a vehicle) and may be poorly cut. Trouble-shooting accuracy is ongoing, but the crown is a frequent culprit.<\/figcaption><\/figure>\n

When testing ammo for accuracy it\u2019s important to eliminate as much human error as possible. Choose a calm day, make sure your bench and rest are dead steady, use visible targets with good aiming points, and concentrate on sight alignment and trigger press.\u00a0<\/span>You are hoping for\u00a0<\/span>nice,\u00a0<\/span>round groups. Vertical stringing is often barrel heat, which, with slender barrels, can show up in<\/span>\u00a0very few<\/span>\u00a0shots.<\/span>\u00a0Take your time and let the barrel cool\u00a0<\/span>completely<\/span><\/i>\u00a0between groups.<\/span>\u00a0<\/span><\/p>\n

Stringing, especially horizontal, can also indicate a bedding problem, but a poorly cut or chipped crown is often the culprit.\u00a0<\/span>The crown is the last thing that touches the bullet as it leaves the muzzl<\/span>e and it must be near-perfect<\/span>.<\/span>\u00a0<\/span>Re-cutting a crown is a simple gunsmithing procedure, and kits are available to do it yourself.<\/span>\u00a0<\/span><\/p>\n

\"An<\/a>
An interesting target from the most accurate Ruger No. One Boddington has owned, in .300 H&H. Center group, vertical stringing with handloaded 200-grain Sierra GameKing. Top left, horizontal stringing with Hornady 180-grain factory. Top right, a perfect group with hand-loaded 150-grain Sierra GameKing. All three are very acceptable for hunting accuracy, but you never know what might work just a bit better!<\/figcaption><\/figure>\n

Barrel fouling can also be a problem. New barrels often have interior tool marks and<\/span>\u00a0collect<\/span>\u00a0foul<\/span>ing\u00a0<\/span>quickly. It\u2019s unwise to pass judgment on a<\/span>\u00a0new<\/span>\u00a0barrel until it\u2019s \u201cbroken in,\u201d which means internally smoothed by 50<\/span>\u00a0or so<\/span>\u00a0shots<\/span>.<\/span>\u00a0Every experienced shooter has a different protocol for breaking in a barrel. Some clean after<\/span>\u00a0<\/span>every<\/span><\/i>\u00a0shot for 10<\/span>\u00a0rounds<\/span>\u00a0or\u00a0<\/span>more<\/span>!<\/span>\u00a0<\/span>W<\/span>ith a new barrel<\/span>,\u00a0<\/span>I clean after five shots\u00a0<\/span>for 20 rounds.\u00a0<\/span>Afterward,\u00a0<\/span>I clean every 15 to 20 shots. Some barrels shoot their best when very clean<\/span>, others\u00a0<\/span>shoot best when slightly fouled,\u00a0<\/span>and a few\u00a0<\/span>barrels that shoot their best groups when\u00a0<\/span>filthy<\/span>.\u00a0<\/span>V<\/span>ary<\/span>\u00a0your cleaning routine<\/span>\u00a0and your barrel will tell you!\u00a0<\/span>\u00a0<\/span><\/p>\n

\"A<\/a>
A spectacular half-inch five-shot group, this one from Donna Boddington\u2019s Blaser .270 with 130-grain Hornady American Whitetail. Modern rifles and today\u2019s factory loads are amazing but, no matter what you do, relatively few rifles will produce groups this tight.<\/figcaption><\/figure>\n

S<\/span>uspect everything, but experiment with a variety of loads before you start hacking away! Realistically, absent a mechanical issue (bedding, crown,\u00a0<\/span>heavy fouling<\/span>\u00a0or pitting<\/span>)<\/span>, most gains from load experimentation<\/span>\u00a0<\/span>will be incremental and rarely exponential. In other words, a rifle that initially produces 1.5<\/span>-inch\u00a0<\/span>groups is unlikely to become\u00a0<\/span>a half-inch<\/span>\u00a0tack<\/span>–<\/span>driver. But, with loads the rifle likes, you\u00a0<\/span>might\u00a0<\/span><\/i>cajole it into producing<\/span>\u00a0the one-inch groups you want to see.<\/span>\u00a0<\/span><\/p>\n

\"A<\/a>
A gorgeous desert mule, taken with the most finicky rifle Boddington ever owned, a Remington .280 Mountain Rifle. It grouped poorly with all factory loads then available, but shot extremely well with very \u201cstandard-recipe\u201d hand-loads.<\/figcaption><\/figure>\n

However, you won\u2019t know until you keep trying. A few barrels are finicky, and come to life when you discover the right load, we all have stories! When that model was relatively new, I had a Remington Mountain Rifle in <\/span>280 Remington<\/a><\/span>, typically an accurate cartridge, but never available in a wide selection of loads. Editor and friend Scott Rupp once commented to me that \u201cRemington rifles tend to shoot well with Remington ammo.\u201d This is often true\u2026but not this one! Regardless of brand, this rifle fired shotgun patterns, rarely under three inches. I tried hand-loads, and a standard recipe with IMR 4831 and 150-grain Nosler Ballistic Tip instantly brought it down to sub-MOA groups, problem solved!\u00a0<\/span><\/p>\n

\"All<\/a>
All center-fire metallic cartridges consist of case, primer, propellant, and bullet. A hand-loader can vary all four components almost infinitely, while a factory load is just one combination.<\/figcaption><\/figure>\n

A<\/span>nother colleague had a 30-06 <\/span>that wouldn\u2019t<\/span>\u00a0shoot. He tried everything, awful groups. Frustrated and desperate, he happened to have an old box of Winchester 220-grain round-nose. Amazingly, this slow, near-obsolete load shot extremely well in that rifle. So, you never know, but you also have to be realistic. Even today, not all barrels are going to provide extreme accuracy\u2026no matter what you try. As they say, \u201cyou can\u2019t make a silk purse from a sow\u2019s ear.\u201d Any rifle barrel is only capable of a certain degree of accuracy, and even today bad barrels exist.\u00a0<\/span>Experimenting with different loads should, over time, reveal the accuracy your rifle is capable of. Whether or not\u00a0<\/span>the groups are<\/span>\u00a0what you want is one thing; whether or not you can live with\u00a0<\/span>them<\/span>\u00a0is another. Match-grade barrels are expensive, but good replacement barrels are not!<\/span>\u00a0<\/span><\/p>\n

LG Outdoors Caliber Dictionary<\/a><\/strong><\/p>\n