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<blockquote data-quote="J E Custom" data-source="post: 464226" data-attributes="member: 2736"><p>I did quite a bit of research on the 416s because they seem to be a good all round dangerous </p><p>game caliber.</p><p></p><p>This was the opinion of what was available at the time .</p><p></p><p>I bought a fine Remington custom shop rifle for an upcoming brown bear hunt and started </p><p>testing different bullets and powders.</p><p></p><p>The 416 rem seemed to like the 325 grain bullets best and I was fine with that for bears.(Velocity</p><p>was just over 2600 ft/sec) but I wanted to use the 400 or 410 grain bullets for the big stuff and </p><p>the 400+ bullets did not like the temperature over 95 to 100o (Pressure would go up to high)</p><p>and could cause problems. the case capacity was just not enough for the bigger bullets.</p><p></p><p>The 416 Rigby has the case capacity but the cases are not very strong and limit pressure. the Rigby</p><p>does allow the use of slower burning powder and this improves the high temperature use.</p><p></p><p>Both the Remington and the Rigby can push the 400 grain between 2350 and 2400 ft/sec under</p><p>normal conditions. (But I wanted more)</p><p></p><p>The next thing available with any real advantage was the 416 Weatherby. It had everything,</p><p>powder volume, velocity, energy (And recoil) and could push a 400 grain to 2700 ft/sec .</p><p></p><p>So armed with all of this information I started looking for a modern case design that had a</p><p>capacity of almost as much as the Weatherby for high temp use (100o +) with lots of slow</p><p>burning powder.</p><p></p><p>The case that I found was a 375 RUM. Not as large as the Weatherby but with enough case </p><p>capacity for the big bullets.</p><p></p><p>There are a few wildcat or proprietary cartridges that will meet or exceed the Weatherby but </p><p>they come with there own problems and I wanted to keep things simple and reasonably </p><p>priced.</p><p></p><p>I had Hornady build my dies off the Manson reamer I had designed and was very happy with </p><p>both. I have not tried the 450 grain bullets in my 416 Buff because they were not available </p><p>at the time . but velocity with the 400 grain to date without loading it to the max has been</p><p>just over 2600 ft/sec .</p><p></p><p>With no muzzle break that is about my limit as far as recoil. My range sessions last about</p><p>20 to 25 shots and the fun has gone out of it.</p><p></p><p>I am extremely happy with the 416 buff and dont plan to shoot farther than 5 or 600 Yards.</p><p></p><p>"BUT" if I wanted to move a 450 gr or larger faster I would look at the Weatherby(Capacity</p><p>around 126 grains) or a 505 Gibbs necked down to 416.</p><p></p><p>Both of these cartridges should be built on the Mark 5 or a large custom action for strength.</p><p></p><p>My 416 is built on a Remington and works great at the pressures required. Accuracy has been</p><p>phenomenal with the 400 grain bullets with the best 3 shot group to date a .031 at 100 yards.</p><p>(my personal best to date).</p><p></p><p>I also looked at the 416 Barret but bullets, brass dies and reamers were proprietary and </p><p>extremely expensive.</p><p></p><p>To look at the rifle, do a search on -416 Buff- . there are several post and pictures on the earlier </p><p>thread.(I think they are on the second page)</p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 464226, member: 2736"] I did quite a bit of research on the 416s because they seem to be a good all round dangerous game caliber. This was the opinion of what was available at the time . I bought a fine Remington custom shop rifle for an upcoming brown bear hunt and started testing different bullets and powders. The 416 rem seemed to like the 325 grain bullets best and I was fine with that for bears.(Velocity was just over 2600 ft/sec) but I wanted to use the 400 or 410 grain bullets for the big stuff and the 400+ bullets did not like the temperature over 95 to 100o (Pressure would go up to high) and could cause problems. the case capacity was just not enough for the bigger bullets. The 416 Rigby has the case capacity but the cases are not very strong and limit pressure. the Rigby does allow the use of slower burning powder and this improves the high temperature use. Both the Remington and the Rigby can push the 400 grain between 2350 and 2400 ft/sec under normal conditions. (But I wanted more) The next thing available with any real advantage was the 416 Weatherby. It had everything, powder volume, velocity, energy (And recoil) and could push a 400 grain to 2700 ft/sec . So armed with all of this information I started looking for a modern case design that had a capacity of almost as much as the Weatherby for high temp use (100o +) with lots of slow burning powder. The case that I found was a 375 RUM. Not as large as the Weatherby but with enough case capacity for the big bullets. There are a few wildcat or proprietary cartridges that will meet or exceed the Weatherby but they come with there own problems and I wanted to keep things simple and reasonably priced. I had Hornady build my dies off the Manson reamer I had designed and was very happy with both. I have not tried the 450 grain bullets in my 416 Buff because they were not available at the time . but velocity with the 400 grain to date without loading it to the max has been just over 2600 ft/sec . With no muzzle break that is about my limit as far as recoil. My range sessions last about 20 to 25 shots and the fun has gone out of it. I am extremely happy with the 416 buff and dont plan to shoot farther than 5 or 600 Yards. "BUT" if I wanted to move a 450 gr or larger faster I would look at the Weatherby(Capacity around 126 grains) or a 505 Gibbs necked down to 416. Both of these cartridges should be built on the Mark 5 or a large custom action for strength. My 416 is built on a Remington and works great at the pressures required. Accuracy has been phenomenal with the 400 grain bullets with the best 3 shot group to date a .031 at 100 yards. (my personal best to date). I also looked at the 416 Barret but bullets, brass dies and reamers were proprietary and extremely expensive. To look at the rifle, do a search on -416 Buff- . there are several post and pictures on the earlier thread.(I think they are on the second page) J E CUSTOM [/QUOTE]
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