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Rifles, Reloading, Optics, Equipment
Reloading
New Load Advice
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<blockquote data-quote="Darkker" data-source="post: 1184649" data-attributes="member: 81406"><p>4831 is going to be hard pressed to get you that velocity with a 180gr. So, "is it a good idea?" That is an open ended question, but here are some realistic answers.</p><p>Most good data is fired from SAAMI minimum spec test equipment, meaning mass produced fir firearms won't be able to achieve the same velocities. No one lists lot numbers tested, everyone ASSumes that canister powder is identical, it is NOT. So does your powder have the same burninaround? Likely not, when you suddenly match or exceed book velocity, you have exceeded book pressures, regardless of the specific charge weights used. </p><p>It had also become vogue for new reloaders to make two dangerous assumptions.</p><p>1) You can accurately and safely guage Pressure by "signs". That is absolutely false! In most modern firearms, using unknown alloys in brass, the average Joe will " notice" pressures, North of 70,000psi; I have the Pressure Traces from rifles to prove this fact. "Signs" are better than nothing, but absolutely no better than that. The chronograph is what keeps you within limits.</p><p>2) Max loads are somehow accurate. While this certainly can be the case, in all of my rifles, it is rarely so. Find what shoots accurately, and work with that.</p><p></p><p>Speed is what opens bullets, the partitions generally open reliably to around 1900fps. The TTS bullets are in the same neighborhood from my last email from them. But the safe bet is to call and ask.</p><p></p><p>So, is loading that speed a "good idea"? Depends upon what you want to do. I wouldn't run that hard, buy maybe you feel differently.</p></blockquote><p></p>
[QUOTE="Darkker, post: 1184649, member: 81406"] 4831 is going to be hard pressed to get you that velocity with a 180gr. So, "is it a good idea?" That is an open ended question, but here are some realistic answers. Most good data is fired from SAAMI minimum spec test equipment, meaning mass produced fir firearms won't be able to achieve the same velocities. No one lists lot numbers tested, everyone ASSumes that canister powder is identical, it is NOT. So does your powder have the same burninaround? Likely not, when you suddenly match or exceed book velocity, you have exceeded book pressures, regardless of the specific charge weights used. It had also become vogue for new reloaders to make two dangerous assumptions. 1) You can accurately and safely guage Pressure by "signs". That is absolutely false! In most modern firearms, using unknown alloys in brass, the average Joe will " notice" pressures, North of 70,000psi; I have the Pressure Traces from rifles to prove this fact. "Signs" are better than nothing, but absolutely no better than that. The chronograph is what keeps you within limits. 2) Max loads are somehow accurate. While this certainly can be the case, in all of my rifles, it is rarely so. Find what shoots accurately, and work with that. Speed is what opens bullets, the partitions generally open reliably to around 1900fps. The TTS bullets are in the same neighborhood from my last email from them. But the safe bet is to call and ask. So, is loading that speed a "good idea"? Depends upon what you want to do. I wouldn't run that hard, buy maybe you feel differently. [/QUOTE]
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