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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel length and accuracy ?
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<blockquote data-quote="Trickymissfit" data-source="post: 1143224" data-attributes="member: 25383"><p>Dan Lilja once said that with a #7 contour a 21" barrel was 2.75 stiffer than a standard 26" barrel. I didn't believe him! I did my own tests and found he comments to ring true. </p><p></p><p>Now I took a junk barrel chambered in .223. Cut 1.75" (or about) off the big end to remove the chamber and a bad throat. The muzzle had a pronounced bell mouth, and I cut that off for a 20" barrel. Out of the box, it was a rock solid 5"+ gun! I worked a lot of hand loads thru it and finally got it to shoot 4.25" five shot groups. I loaned the rifle to some bench rest shooters out of Fairland IN (known to be at the top of their game). After a couple weeks they asked how I managed to get it to shoot 4"+ groups? After I put the rifle back together, and still fighting with a really junky trigger; it shot sub half inch groups (same basic loads by the way). The barrel is still junk, and virtually groups are sub half inch, and dipping down to about .38" every once in awhile. </p><p></p><p>The real difference between the two barrels in my book is purely harmonics (the muzzle is still loose). The chamber of course is better, but I doubt the rifle would have shot two inch groups with that chamber.</p><p></p><p>A few years back Savage and Remington made a run of 20" barreled .308 bolt guns. Mostly geared towards police, but anybody could buy one. I knew a guy that owned both, plus a short barreled 788 Remington. All three of these rifles out shot nearly every 26" barreled .308 in the area. By the way the 788 out shot the other two!</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 1143224, member: 25383"] Dan Lilja once said that with a #7 contour a 21" barrel was 2.75 stiffer than a standard 26" barrel. I didn't believe him! I did my own tests and found he comments to ring true. Now I took a junk barrel chambered in .223. Cut 1.75" (or about) off the big end to remove the chamber and a bad throat. The muzzle had a pronounced bell mouth, and I cut that off for a 20" barrel. Out of the box, it was a rock solid 5"+ gun! I worked a lot of hand loads thru it and finally got it to shoot 4.25" five shot groups. I loaned the rifle to some bench rest shooters out of Fairland IN (known to be at the top of their game). After a couple weeks they asked how I managed to get it to shoot 4"+ groups? After I put the rifle back together, and still fighting with a really junky trigger; it shot sub half inch groups (same basic loads by the way). The barrel is still junk, and virtually groups are sub half inch, and dipping down to about .38" every once in awhile. The real difference between the two barrels in my book is purely harmonics (the muzzle is still loose). The chamber of course is better, but I doubt the rifle would have shot two inch groups with that chamber. A few years back Savage and Remington made a run of 20" barreled .308 bolt guns. Mostly geared towards police, but anybody could buy one. I knew a guy that owned both, plus a short barreled 788 Remington. All three of these rifles out shot nearly every 26" barreled .308 in the area. By the way the 788 out shot the other two! gary [/QUOTE]
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Barrel length and accuracy ?
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