Posted: Tue Jun 29, 2010 7:39 am Post subject: Bullets disintergrating
On Sunday our club had a 900 and 1000 yard shoot at Bisley, the weather was hot for us in the high 80's, 2 of the shooters had numerous bullets disintergrate around 50 yards out. Both hadnt changed from their normal recipe. One was a .243 AI moly coated and one 6.5 x .284. The question is would the higher ambient temperature have caused the disintergration? _________________ Growing old is mandatory, growing up isnt
Posted: Tue Jun 29, 2010 9:19 pm Post subject: Re: Bullets disintergrating
hammie wrote:
On Sunday our club had a 900 and 1000 yard shoot at Bisley, the weather was hot for us in the high 80's, 2 of the shooters had numerous bullets disintergrate around 50 yards out. Both hadnt changed from their normal recipe. One was a .243 AI moly coated and one 6.5 x .284. The question is would the higher ambient temperature have caused the disintergration?
Well, yes, but not directly. The higher ambient temperature and presumably sunshine likely resulted in higher round temperature...resulting in higher pressures from a faster burnrate...resulting in higher velocities. It's the higher velocity that earns you a zero on target because the bullet didn't get there.
Tell 'em to either back off on the powder-can-tippig, or use less temp-sensisive powder. Either way, overbore cartridges like those two are wont to do that kind of thing.
Keeping your rounds in the shade/a cooler helps out with that as well.
Even though I use RL-15, at 600 yards, I still find myself dropping 1/4 to 1/2 minute over a 22-shot string to keep them on the X-ring.
You'll have that.
-Nate _________________ Shooting well is this: account for all determinate variables as perfectly as possible such that you may devote your brain to understanding--and compensating for--the indeterminate.
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