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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 Remington Ultra Mag load data desired
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<blockquote data-quote="Darryl Cassel" data-source="post: 20986" data-attributes="member: 34"><p>Dave you may find that, the 300 gr will be your best compititive bullet to use. </p><p>At 2700 FPS in the 27" barrel that, is doing just fine. </p><p></p><p>To bad the throat in you rifle is not extended enough to seat the bullet out further.</p><p>A friend of mine at Williamsport has a 340 Weatherby imp. and with his 34" barrel,puts 92 gr of 25 in with the 300 gr bullet. He is doing VERY well with it too. </p><p>My load in a 340 Lilja IMP (340 case) rifle I use to shoot was also 90 to 92 grs of 25 or 5010. It did quite well with either powder.</p><p></p><p>Why extractor marks half way up your test list of powder?????????? Excess head space with THAT case? Bumped the shoulder back to far? I did run into a batch of 300 gr bullets that were just a bit OVERSIZE in the diameter. I measured some that were .3380" and went up to a few that went to one or two that were .3385". Talking to Sierra folks, I found that the allowable limits are to be up to .3384" on that bullet. You may have had a slight pressure problem from a slightly bigger diameter bullet. This happens more then one realizes. It's still a puzzle but, an answer can be found. </p><p></p><p>I think RL25 may be the way to stay with the 300 gr and experiment a bit more with the 250 gr and RL22 </p><p></p><p>Good luck and your doing fine</p><p>Darryl</p></blockquote><p></p>
[QUOTE="Darryl Cassel, post: 20986, member: 34"] Dave you may find that, the 300 gr will be your best compititive bullet to use. At 2700 FPS in the 27" barrel that, is doing just fine. To bad the throat in you rifle is not extended enough to seat the bullet out further. A friend of mine at Williamsport has a 340 Weatherby imp. and with his 34" barrel,puts 92 gr of 25 in with the 300 gr bullet. He is doing VERY well with it too. My load in a 340 Lilja IMP (340 case) rifle I use to shoot was also 90 to 92 grs of 25 or 5010. It did quite well with either powder. Why extractor marks half way up your test list of powder?????????? Excess head space with THAT case? Bumped the shoulder back to far? I did run into a batch of 300 gr bullets that were just a bit OVERSIZE in the diameter. I measured some that were .3380" and went up to a few that went to one or two that were .3385". Talking to Sierra folks, I found that the allowable limits are to be up to .3384" on that bullet. You may have had a slight pressure problem from a slightly bigger diameter bullet. This happens more then one realizes. It's still a puzzle but, an answer can be found. I think RL25 may be the way to stay with the 300 gr and experiment a bit more with the 250 gr and RL22 Good luck and your doing fine Darryl [/QUOTE]
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338 Remington Ultra Mag load data desired
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