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Rifles, Reloading, Optics, Equipment
Reloading
Is powder residue on should & neck a safety issue?
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<blockquote data-quote="SakoShooterSD" data-source="post: 508364" data-attributes="member: 33931"><p>Reloader222, thanks. </p><p>I had not thought about the bullet seating depth, but it makes good sense. I have these bullets seated for maximum recommended COAL of about 3.290", which seemed to produce slightly better groups than 0.015 and 0.030" shorter COAL. I don't yet know how far off the lands that puts these TTSX bullets, but I'm working on measuring that now . . .</p><p></p><p>My bullet seating depth measurement tool (part of the the RCBS "precision mic" kit) tells me that my chamber measures 0.020". When I use the same setup to measure one of these loaded cartridges, I get 0.008", . . . so, looking at the difference between those two measurements, I would say these cartridges have the bullet seated 0.012" off the lands. I would like to keep it around 0.010 or under if I can. (I'm a bit superstitious about guns that shoot better when the bullet has to "jump the gap". That makes little sense to me . . . though I am a neophyte at this game.)</p><p></p><p>When I put a micrometer on a bullet, it measures approximately 1.43" long (including the plastic tip), . . . and I measure about 0.82" protruding beyond the neck of the case for these loads . . . so there is about 0.6" of bullet length seated. (Base of the bullet actually sitting almost 1/4" below the shoulder). That seems like it would be sufficient, but . . . who knows?</p></blockquote><p></p>
[QUOTE="SakoShooterSD, post: 508364, member: 33931"] Reloader222, thanks. I had not thought about the bullet seating depth, but it makes good sense. I have these bullets seated for maximum recommended COAL of about 3.290", which seemed to produce slightly better groups than 0.015 and 0.030" shorter COAL. I don't yet know how far off the lands that puts these TTSX bullets, but I'm working on measuring that now . . . My bullet seating depth measurement tool (part of the the RCBS "precision mic" kit) tells me that my chamber measures 0.020". When I use the same setup to measure one of these loaded cartridges, I get 0.008", . . . so, looking at the difference between those two measurements, I would say these cartridges have the bullet seated 0.012" off the lands. I would like to keep it around 0.010 or under if I can. (I'm a bit superstitious about guns that shoot better when the bullet has to "jump the gap". That makes little sense to me . . . though I am a neophyte at this game.) When I put a micrometer on a bullet, it measures approximately 1.43" long (including the plastic tip), . . . and I measure about 0.82" protruding beyond the neck of the case for these loads . . . so there is about 0.6" of bullet length seated. (Base of the bullet actually sitting almost 1/4" below the shoulder). That seems like it would be sufficient, but . . . who knows? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Is powder residue on should & neck a safety issue?
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