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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
243 win, IMR 4451, RL 26 velocity results
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<blockquote data-quote="westcliffe01" data-source="post: 1075023" data-attributes="member: 35183"><p><strong>Re: 243 win, IMR 4451, RL 26 Ladder/velocity results</strong></p><p></p><p>So if I understand, you loaded 1 bullet with each weight of powder ? What does that tell you ?</p><p></p><p>For a ladder test, you try to pre-determine the best seating depth for your bullet, then load 5 each with each powder weight. Then shoot a 5 round group with each set, always using the same point of aim. Then you compare drop relative to point of aim and GROUP SIZE to determine which powder node looks promising. Take along some unrelated loads or factory ammo to get the bore fouled and into a stable condition prior to shooting test loads.</p><p></p><p>Something about your reloading data looks fishy. Max loads for the 105gr A max are listed at 2980fps on the Hodgdon reloading website (with 40.4gr of IMR 4451) while your 87gr Vmax loads seem a tad slow (43.8gr of 4451 giving 3342fps from a 24" barrel).</p><p></p><p>So somehow you are slow on the light bullet and fast on the heavy one ? And your max load is way over the posted limit for the Vmax ? And you have no group information so you have no idea which load is going to repeat well, regardless of how fast it is ?</p><p></p><p>I have been running a calculated 3200fps with a 95gr Berger hunting bullet, but that is with an AI chamber. I certainly would not expect that kind of speed with a 105gr. Be careful, don't get hurt and check if anything groups a **** near the ragged edge. Sometimes there is a high node that works out, but not all of the time. A very hot load that you develop in spring could cause serious problems in the middle of summer, or if you tweak the seating depth or use a different primer.</p></blockquote><p></p>
[QUOTE="westcliffe01, post: 1075023, member: 35183"] [b]Re: 243 win, IMR 4451, RL 26 Ladder/velocity results[/b] So if I understand, you loaded 1 bullet with each weight of powder ? What does that tell you ? For a ladder test, you try to pre-determine the best seating depth for your bullet, then load 5 each with each powder weight. Then shoot a 5 round group with each set, always using the same point of aim. Then you compare drop relative to point of aim and GROUP SIZE to determine which powder node looks promising. Take along some unrelated loads or factory ammo to get the bore fouled and into a stable condition prior to shooting test loads. Something about your reloading data looks fishy. Max loads for the 105gr A max are listed at 2980fps on the Hodgdon reloading website (with 40.4gr of IMR 4451) while your 87gr Vmax loads seem a tad slow (43.8gr of 4451 giving 3342fps from a 24" barrel). So somehow you are slow on the light bullet and fast on the heavy one ? And your max load is way over the posted limit for the Vmax ? And you have no group information so you have no idea which load is going to repeat well, regardless of how fast it is ? I have been running a calculated 3200fps with a 95gr Berger hunting bullet, but that is with an AI chamber. I certainly would not expect that kind of speed with a 105gr. Be careful, don't get hurt and check if anything groups a **** near the ragged edge. Sometimes there is a high node that works out, but not all of the time. A very hot load that you develop in spring could cause serious problems in the middle of summer, or if you tweak the seating depth or use a different primer. [/QUOTE]
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243 win, IMR 4451, RL 26 velocity results
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