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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
1600 yard rifle and bore
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<blockquote data-quote="Teri Anne" data-source="post: 2379501" data-attributes="member: 118816"><p>It has been my experience with Browning factory barrels that they take a long time and many through cleanings to include lots of copper fouling being removed after each 20 rounds down range. I have a Browning 300 WM and was sorely disappointed with the first 150 rounds shot. The best group size was 2 1/2 inches, with most around 3 inches. Suddenly around 180 shots the groups tightened up and copper fouling was reduced to smudging and by 200 rounds the groups were down to 1MOA. Currently have 250 rounds down the barrel and it is now grouping between 1/2 MOA and 3/4 MOA depending upon the ammunition. It prefers 180 gr ammo and velocities just about 100 fps below max. If pushed up to max or over watching for pressure signs the groups open up.</p></blockquote><p></p>
[QUOTE="Teri Anne, post: 2379501, member: 118816"] It has been my experience with Browning factory barrels that they take a long time and many through cleanings to include lots of copper fouling being removed after each 20 rounds down range. I have a Browning 300 WM and was sorely disappointed with the first 150 rounds shot. The best group size was 2 1/2 inches, with most around 3 inches. Suddenly around 180 shots the groups tightened up and copper fouling was reduced to smudging and by 200 rounds the groups were down to 1MOA. Currently have 250 rounds down the barrel and it is now grouping between 1/2 MOA and 3/4 MOA depending upon the ammunition. It prefers 180 gr ammo and velocities just about 100 fps below max. If pushed up to max or over watching for pressure signs the groups open up. [/QUOTE]
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1600 yard rifle and bore
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