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Rifles, Reloading, Optics, Equipment
Reloading
270wsm and Barnes TTSX powder question
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<blockquote data-quote="Jesse09" data-source="post: 1052050" data-attributes="member: 88547"><p>Okay, I've got it; you disregarded Barnes' instructions about the huge gap; I'll start with as close to .005" as I can determine. I don't need your c.o.a.l. since my own rifle's throating will differ from yours.</p><p></p><p>FYI, I've just finished trying to develop a load for this rifle using the Swift Scirocco II, 130 gn bullet. It was a failure; after about 150 rounds I had determined the best variables and had fired a group or two in the low .400's; thought I was good to go, but the next time out I was spraying bullets. I think the extra long secant ogive of that bullet is what my rifle couldn't handle, consistently. I think the Barnes has a more modest tangent ogive.</p><p></p><p>Also, I learned with the Swift that a normal inside-neck chamfering resulted in too much pressure on the case neck when seating; I had to use a hand VLD chamferer. I plan to hand chamfer for the Barnes, also.</p><p></p><p>Finally, I will seat the Barnes without a crimp; my seater is the Forster Benchrest with micrometer seating dial. I'd guess that I'll end up firing the rifle single-shot - either because the cartridge overall length exceeds the magazine maximum or because recoil changes the ogive. </p><p></p><p>What are your thoughts?</p><p></p><p>Thanks,</p><p>Jesse</p></blockquote><p></p>
[QUOTE="Jesse09, post: 1052050, member: 88547"] Okay, I've got it; you disregarded Barnes' instructions about the huge gap; I'll start with as close to .005" as I can determine. I don't need your c.o.a.l. since my own rifle's throating will differ from yours. FYI, I've just finished trying to develop a load for this rifle using the Swift Scirocco II, 130 gn bullet. It was a failure; after about 150 rounds I had determined the best variables and had fired a group or two in the low .400's; thought I was good to go, but the next time out I was spraying bullets. I think the extra long secant ogive of that bullet is what my rifle couldn't handle, consistently. I think the Barnes has a more modest tangent ogive. Also, I learned with the Swift that a normal inside-neck chamfering resulted in too much pressure on the case neck when seating; I had to use a hand VLD chamferer. I plan to hand chamfer for the Barnes, also. Finally, I will seat the Barnes without a crimp; my seater is the Forster Benchrest with micrometer seating dial. I'd guess that I'll end up firing the rifle single-shot - either because the cartridge overall length exceeds the magazine maximum or because recoil changes the ogive. What are your thoughts? Thanks, Jesse [/QUOTE]
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270wsm and Barnes TTSX powder question
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