Bullet comparator

G

gundogblue

Guest
Im not a benchrest shooter, but the reason I joined this forum is because it's so damn interesting and educational. I just have factory rifles, a Savage model-12 in 22-250, and a Savage 10FP in .308, my dies are Hornaday Dimention. When I load I measure every powder charge exactally, I trim my cases to the same length, but when I seat the bullet I can't get them the exact same length, some are always shorter or longer.I read that the reason for this is because the tips of the bullets are'nt always the same, I just measured 100 Hornaday V-max bullets , 50gr .224, and many of them had variations of a few thousands. I want to get the Hornaday OAL guage, and bullet comparator, and measure them off the ogive, will this solve my problem, and give me uniform COAL? Will better dies help with this situation? Any info on this will be gratly appriciated as it's driving me crazy.
Thanks,
Paul
 
its unlikely you will get or want a uniform coal...because tip lenths vary as you have discovered.
get the tools and go for a uniform length where the tool contacts the bullet(ogive)...you can then move in and out from that length to see if accuracy increases.

now when the groups get small..your gonna need wind flags...cause the wind wil move them around at 100 yds....

you you are headed in the right direction....

mike in co
 
If your seater stem makes initial contact on the ogive of the bullet, the relation to the barrel lands becomes a function of bullet consistency. If the bullets all come from the same pointing die, this relation will be largely unmeasurable.
 
They all address the bullet somewhere along the ogive, unless they've been manufactured before modern profiles have proliferated. The trick is deciding what position avoids being too close to the tip to be irrelevant as far as precision is concerned or too close to the ogive/parallel junction so as to potentially distort a significant point on the projectile's profile.
 
A friend has the idea of making seating dies that uses bushings instead of stems. That is to say, one would use a bushing that is close to the size of where the bullet engages the lands. This isn't a bad idea, actually. The current lot of dies use stems that touch the ogive too close to the tip. The problem comes from the amount of lube on the jackets when they are pointed. Uneven lube causes uneven ogive lengths.
 
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Pete Wass
Do the ReddingCompetitionnSeater'ss work like that ?
Max
 
Max,

Reddings have a punch calibre diameter but take the cavity of the bullet point pretty wide - wide enough so I expanded the tip & chewed out the die body while seating heavy projectiles onto full case to compressed loads with a .308 Winchester.

John
 
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