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Rifles, Reloading, Optics, Equipment
Reloading
loads for .30-338 win mag
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<blockquote data-quote="Bart B" data-source="post: 119632" data-attributes="member: 5302"><p>Thousands of .30-.338 rounds have been fired in 600 and 1000 yard matches with this great old cartridge. Many people tried types of ball powder but it never produced accuracy as good as extruded powder. Top competitors settled on IMR4350 as the powder of choice. And standard primers always produced best accuracy; the milder ones were and still are excellent. The PMC large rifle primer may well be the best these days as it's a favorite of long range folks shooting the best scores. Best accuracy was/is with new cases or full-length sized ones that set the shoulder back about 6 thousandths and size the body all the way back to the belt; no step in front of the belt.</p><p></p><p>I wore out four .30-.338 barrels using IMR4350; 65 or 66 grains with 190 HPMK's, 64 or 65 with 200's in 1:12 twist barrels. They all shot under 6 inches at 1000 yards for 25 consecutive shots. </p><p></p><p>When testing loads, shoot at least 15 shots per test group at the longest range available. Don't use the smallest of several 3 or 5 shot groups at any range to base accuacy on. It doesn't matter how tiny the smallest few shot group is; all the other groups are larger which is why they're meaningless as far as the accuracy level is that one can count on all the time.</p></blockquote><p></p>
[QUOTE="Bart B, post: 119632, member: 5302"] Thousands of .30-.338 rounds have been fired in 600 and 1000 yard matches with this great old cartridge. Many people tried types of ball powder but it never produced accuracy as good as extruded powder. Top competitors settled on IMR4350 as the powder of choice. And standard primers always produced best accuracy; the milder ones were and still are excellent. The PMC large rifle primer may well be the best these days as it's a favorite of long range folks shooting the best scores. Best accuracy was/is with new cases or full-length sized ones that set the shoulder back about 6 thousandths and size the body all the way back to the belt; no step in front of the belt. I wore out four .30-.338 barrels using IMR4350; 65 or 66 grains with 190 HPMK's, 64 or 65 with 200's in 1:12 twist barrels. They all shot under 6 inches at 1000 yards for 25 consecutive shots. When testing loads, shoot at least 15 shots per test group at the longest range available. Don't use the smallest of several 3 or 5 shot groups at any range to base accuacy on. It doesn't matter how tiny the smallest few shot group is; all the other groups are larger which is why they're meaningless as far as the accuracy level is that one can count on all the time. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
loads for .30-338 win mag
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