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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Pushing a .338 as fast as possible
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<blockquote data-quote="Darryl Cassel" data-source="post: 23060" data-attributes="member: 34"><p>Moosehunter</p><p></p><p>The 416 Rigby case when Improved with a 35 degree shoulder and minimum tapor is ideal for the 338 --300 grain bullet.</p><p></p><p>I have driven the 300 gr out of my 37" barrel at 3310 FPS with 122.5 grs of powder if I didn't care about loading my brass more then two times.</p><p></p><p>I have backed it off to 3200 Fps and the Norma brass holds up quite well. At the 3200 mark the bullet performs extremely well and you really don't need any more speed then that for the 300 gr bullet to perform WAY out there. It has killed elk at 2100 yards for me and I have a friend with the exact same chambering as me who is shooting the 338/416 IMP to 3350 FPS and his group killed their elk a few yyears ago at 2890 yards with 4 witnesses from the Williamsport 1000 yard club.</p><p></p><p>I had the chance to buy a 338/50 cal made on the shorter spotter round and turned it down because it would not give the velocity my 338/416 was giving me and it was using a lot more powder. It had a disadvantage in that the barrel was shorter then mine and was not able to burn all the powder.</p><p></p><p>Long barrels and slow powders are the answer when getting velocity out of the 338---300 gr bullets.</p><p></p><p>Some people keep the velocity of the 300 from 3000 Fps to 3100 fps and the bullet performs well on game.</p><p></p><p>At 3200 to 3310 it is "unbelievable" on elk and mule deer.</p><p></p><p>I wouldn't want anything more powerful then the 416 size case but, if I did, I would go to the 408 CHEY TAC case (505 Gibbs) and neck it down to 338. There may be a slight velocity increase but, I don't know since I have not tried it.</p><p></p><p>I'm happy with the 338/416 Rigby Imp.</p><p></p><p>Darryl Cassel</p></blockquote><p></p>
[QUOTE="Darryl Cassel, post: 23060, member: 34"] Moosehunter The 416 Rigby case when Improved with a 35 degree shoulder and minimum tapor is ideal for the 338 --300 grain bullet. I have driven the 300 gr out of my 37" barrel at 3310 FPS with 122.5 grs of powder if I didn't care about loading my brass more then two times. I have backed it off to 3200 Fps and the Norma brass holds up quite well. At the 3200 mark the bullet performs extremely well and you really don't need any more speed then that for the 300 gr bullet to perform WAY out there. It has killed elk at 2100 yards for me and I have a friend with the exact same chambering as me who is shooting the 338/416 IMP to 3350 FPS and his group killed their elk a few yyears ago at 2890 yards with 4 witnesses from the Williamsport 1000 yard club. I had the chance to buy a 338/50 cal made on the shorter spotter round and turned it down because it would not give the velocity my 338/416 was giving me and it was using a lot more powder. It had a disadvantage in that the barrel was shorter then mine and was not able to burn all the powder. Long barrels and slow powders are the answer when getting velocity out of the 338---300 gr bullets. Some people keep the velocity of the 300 from 3000 Fps to 3100 fps and the bullet performs well on game. At 3200 to 3310 it is "unbelievable" on elk and mule deer. I wouldn't want anything more powerful then the 416 size case but, if I did, I would go to the 408 CHEY TAC case (505 Gibbs) and neck it down to 338. There may be a slight velocity increase but, I don't know since I have not tried it. I'm happy with the 338/416 Rigby Imp. Darryl Cassel [/QUOTE]
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Pushing a .338 as fast as possible
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