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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
30 Sherman Magnum 20” Build
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<blockquote data-quote="CA48" data-source="post: 2585442" data-attributes="member: 21446"><p>Yes, those were single feed. I'm running CIP mags as well. 84gr was were I saw a visible clear ej mark. There was a very faint ej mark at 83gr but you had to hold it in the sun and look hard to see it.</p><p></p><p>I've seen some drastic changes in where a load will pressure out just by changing bullet lots, due to the new lot having a longer bearing surface measurement. What is the lot # on the 245s your using?</p><p></p><p>It's possible the shorter COAL could be the reason. I see that with 81gr your at 2743fps and at 81gr I'm at 2729fps. In the grand scheme of things we are running pretty close. It seems your pressuring out 2-3 gr earlier. Still close seeing as we are probably running different lots of powder, primers, and bullets, along with different barrel manufactures. Also I've tested my magneto speed against 2 different lab radar's and both the Lab radars ran about 15fps faster than my 1st gen MS.</p></blockquote><p></p>
[QUOTE="CA48, post: 2585442, member: 21446"] Yes, those were single feed. I’m running CIP mags as well. 84gr was were I saw a visible clear ej mark. There was a very faint ej mark at 83gr but you had to hold it in the sun and look hard to see it. I’ve seen some drastic changes in where a load will pressure out just by changing bullet lots, due to the new lot having a longer bearing surface measurement. What is the lot # on the 245s your using? It’s possible the shorter COAL could be the reason. I see that with 81gr your at 2743fps and at 81gr I’m at 2729fps. In the grand scheme of things we are running pretty close. It seems your pressuring out 2-3 gr earlier. Still close seeing as we are probably running different lots of powder, primers, and bullets, along with different barrel manufactures. Also I’ve tested my magneto speed against 2 different lab radar’s and both the Lab radars ran about 15fps faster than my 1st gen MS. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
30 Sherman Magnum 20” Build
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