flash hole size

[johara1]

i've have been working on a 6.5 x47l with the small flash holes, i opened them to .063 and used the primer pocket uniformer. necks are turned to .012 and the reamer has a .290 neck.so i thought every thing was right but i was told that the flash holes should be .080. what gives? need to know.......jim

 

[rstreich]

Ignore whomever told you this.

BTW, what's more important than neck thickness is the total neck diameter with a bullet seated.

robert

 

[johara1]

rstreich, it's a .288 neck on the loaded round. and the chamber has a .290 neck,and i'm running .0015 head space........jim

 

[jb1000br]

Personally I let the diameter where it is, just clean up the bur,with a tool from K&M that does NOT touch the diameter)

Do NOT open the holes up to 0.080"!

2thou total clearance on the necks is the tightest I would go...I personally go about 3thou total...not that that is better or worse.

JB

 

[rstreich]

How are you measuring your shoulder bump? Personally, I don't start bumping the shoulders until I get a few cases with a couple three firings on them. That way I can feel more confident that they've formed pretty well to the chamber length.

Seriously, though, take any advice of whoever told you to open the flash holes to 0.080" with a grain of salt.

 

[johara1]

rstreich, i set my die up with my go gauge,.0015 over it then i use my stub to measure the case length. i didn't open any flash holes up,but i just had to ask.my smallest group was a .150 most are in the ....2s and low .3s with a tube gun.........jim