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Rifles, Reloading, Optics, Equipment
Reloading
270 win 150 partition velocities
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<blockquote data-quote="CogburnR" data-source="post: 1241622" data-attributes="member: 29174"><p>All loads should be reduced and then worked up to find the maximum in a particular rifle. All rifles are a little different and some are quite a bit different. Some may max out past the book, some may max out before the book max is reached.</p><p></p><p>Loading manuals are also like that, some of them had some pretty hot loads. H4831 was originally war surplus government powder, the current production is not quite the same. The surplus powder has been gone for quite a while. Bob Hagel's book(a good book by the way) came out in 1978 and at that time the newer production powder was out but the loads listed were probably for the surplus powder. The Speer #9 had some hot ones also but it was from 1974. Current data usually comes from companies that use modern pressure sensing equipment also, the actual pressure is known.</p><p></p><p>I had one M70 that maxed out around 53g OF H4831 with the 150NPT. And it was like that with all powders and bullets. Drop one in with 57g and it would have been a problem. It also had a pretty tight chamber, I had to cut the bottom off my die so it would resize the brass enough to fit back in. </p><p></p><p>My Buddy just bought a really nice M700 270win. It is slow, that's the way it is. Even with max loads it is 200fps slower than what it "should" be.</p></blockquote><p></p>
[QUOTE="CogburnR, post: 1241622, member: 29174"] All loads should be reduced and then worked up to find the maximum in a particular rifle. All rifles are a little different and some are quite a bit different. Some may max out past the book, some may max out before the book max is reached. Loading manuals are also like that, some of them had some pretty hot loads. H4831 was originally war surplus government powder, the current production is not quite the same. The surplus powder has been gone for quite a while. Bob Hagel's book(a good book by the way) came out in 1978 and at that time the newer production powder was out but the loads listed were probably for the surplus powder. The Speer #9 had some hot ones also but it was from 1974. Current data usually comes from companies that use modern pressure sensing equipment also, the actual pressure is known. I had one M70 that maxed out around 53g OF H4831 with the 150NPT. And it was like that with all powders and bullets. Drop one in with 57g and it would have been a problem. It also had a pretty tight chamber, I had to cut the bottom off my die so it would resize the brass enough to fit back in. My Buddy just bought a really nice M700 270win. It is slow, that's the way it is. Even with max loads it is 200fps slower than what it "should" be. [/QUOTE]
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Reloading
270 win 150 partition velocities
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