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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel cooling devices / practices
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<blockquote data-quote="Bart B" data-source="post: 650362" data-attributes="member: 5302"><p>Pleasant thoughts. Just plain pleasant thoughs are what I think. But only for the .300. Those .338 LM's kick too much for hand-held rifles to shoot accurate. Which is why the .300 Win. Mag. was the most accurate in the hands of top long range shooters testing different rounds for military use some years ago. The .338 LM was pretty bad but the US Army had egos to please and the rest is history. (For everyone, please don't put that claim in this thread that a .338 LM holds the record for the longest range sniper shot in the middle East. We have no idea whatsoever how many other shots that guy took at half that to all of that range that were misses.)</p><p></p><p>Folks have been shooting 30 caliber magnums in long range NRA prone matches since 1935 when a .300 H&H was used to win the big 1000 yard match at the Nationals. They still shoot them nowadays in both prone and benchrest long range matches. Course of fire for matches agt 1000 yards are typically 30 minutes long to shoot unlimited sighting shots then 20 rounds for record. Folks usually take 3 or 4 sighters then go for record. They usually fininsh in 20 to 25 minutes. The good rifles use will shoot all day long under 6 inches at 1000 yards; same as benchrest versions. Barrel life at that accuracy level is typically 1200 or so rounds with the .300 Win. Mag. You'll need to seat bullets out about 50 to 60 thousandths more as the throat wears from new to when accuracy starts going bad. I've worn out three and a half barrels shooting 30 caliber belted cases and won my share of matches doing so.</p></blockquote><p></p>
[QUOTE="Bart B, post: 650362, member: 5302"] Pleasant thoughts. Just plain pleasant thoughs are what I think. But only for the .300. Those .338 LM's kick too much for hand-held rifles to shoot accurate. Which is why the .300 Win. Mag. was the most accurate in the hands of top long range shooters testing different rounds for military use some years ago. The .338 LM was pretty bad but the US Army had egos to please and the rest is history. (For everyone, please don't put that claim in this thread that a .338 LM holds the record for the longest range sniper shot in the middle East. We have no idea whatsoever how many other shots that guy took at half that to all of that range that were misses.) Folks have been shooting 30 caliber magnums in long range NRA prone matches since 1935 when a .300 H&H was used to win the big 1000 yard match at the Nationals. They still shoot them nowadays in both prone and benchrest long range matches. Course of fire for matches agt 1000 yards are typically 30 minutes long to shoot unlimited sighting shots then 20 rounds for record. Folks usually take 3 or 4 sighters then go for record. They usually fininsh in 20 to 25 minutes. The good rifles use will shoot all day long under 6 inches at 1000 yards; same as benchrest versions. Barrel life at that accuracy level is typically 1200 or so rounds with the .300 Win. Mag. You'll need to seat bullets out about 50 to 60 thousandths more as the throat wears from new to when accuracy starts going bad. I've worn out three and a half barrels shooting 30 caliber belted cases and won my share of matches doing so. [/QUOTE]
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