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Rifles, Reloading, Optics, Equipment
Reloading
H4831 and 140 Grain Barnes
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<blockquote data-quote="Shootin4fun" data-source="post: 1107969" data-attributes="member: 28741"><p>I've used IMR4831 with the 140 TSX and gotten good accuracy. 62.9 gr, OAL as they specify. .5" groups @100, 3250+. (I thought that was kinda fast for a 140, but others here and elsewhere have posted similar velocities from 24" tubes using other bullets.) Good groups were thrown from 62.3, 62.6, 62.9.</p><p></p><p>However it turns out I somehow I may have used Hogdon data for the 140 N Partion, and those loads are several grains hotter than what Barnes has posted today. I could swear that the Barnes data had higher mins and max before this ("New" as they indicate) page. I'll note that I was approaching pressure signs. After the 4th reload, some cases caused very stiff bolt opens. </p><p></p><p>I am calling Barnes today to see if they lowered the weights for these loads. The page that is there now is right out of their printed manual, in color. Other pages not marked "New" look the same as before, black and white charts.</p><p></p><p>To anyone reading this, is 3250fps generally too hot for a 139/140gr pill from a 24" barrel in 7mm RM? I know its all based on individual chambers and pressures, but in general is that pushing the limit?</p></blockquote><p></p>
[QUOTE="Shootin4fun, post: 1107969, member: 28741"] I've used IMR4831 with the 140 TSX and gotten good accuracy. 62.9 gr, OAL as they specify. .5" groups @100, 3250+. (I thought that was kinda fast for a 140, but others here and elsewhere have posted similar velocities from 24" tubes using other bullets.) Good groups were thrown from 62.3, 62.6, 62.9. However it turns out I somehow I may have used Hogdon data for the 140 N Partion, and those loads are several grains hotter than what Barnes has posted today. I could swear that the Barnes data had higher mins and max before this ("New" as they indicate) page. I'll note that I was approaching pressure signs. After the 4th reload, some cases caused very stiff bolt opens. I am calling Barnes today to see if they lowered the weights for these loads. The page that is there now is right out of their printed manual, in color. Other pages not marked "New" look the same as before, black and white charts. To anyone reading this, is 3250fps generally too hot for a 139/140gr pill from a 24" barrel in 7mm RM? I know its all based on individual chambers and pressures, but in general is that pushing the limit? [/QUOTE]
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Reloading
H4831 and 140 Grain Barnes
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