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DoubleJ

nicely done, sir.
I misread that as tenthousandths, or 1/10,000

DoubleJ

Tom wrote: All of MY books give measurements in 0.001's; that is thousandths!
Both or my calipers measure in thousandths and if they are off by a
thousandth or two no big deal.
But luckily MY loading manuals indicate most OAL differences in 0.010,
or ten thousandths. So there is a bit of an allowance built in.

Tom

not to be a stickler, but that's actually hundredths.

but both of ya'll's points are well made.

DoubleJ

you're a good man, Tom, I don't care what they say.

thanks fer the tips.

DoubleJ

AndyC wrote:Depends on the caliber - it's more critical with low-volume, higher-pressure calibers (eg 9mmP, 40S&W) than the larger-volume, low-pressure ones (eg .45ACP).

I'd definitely feel uncomfortable shooting a 9mm or .40 which has the bullet pushed in 1/10th " deeper than normal (uncomfortable to the extent that I wouldn't shoot it, that is).

Tom: that's what I gathered from Andy C.
thanks ya'll.

another Q. I bought this Harrell Precision culver powder dispenser.
the thing hates Unique. can't get two consistent "throws" either on or off!
anybody have any powder suggestions?
for 9mm, if that's any consequence...

DoubleJ

I have a Q.
at what point do you need to worry about the deviation of your OAL causing pressure problems.
I understand that a shorter OAL means a higher pressure level, but to what extent? is a deviation of .010 going to mean anything, or would it take a deviation of .5 or something?

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