Failing to pass case gauge but unsure why

[Furrly]

 If its 5 out of 50 not passing its more likely cause bulge, like others have mention.. Lee U-die will help. 

[IHAVEGAS]

On 8/4/2018 at 4:05 AM, Hi-Power Jack said:

If they PLUNK in your barrel, there is NO problem.

 

Bet the other five will probably also successfully fire in your gun 

 

But, just to be sure, I take the five that do NOT Plunk, and put them

in my practice pile - most go bang anyway      

 

 

 

I have about a 10-15% reject rate on 9mm, using a 100 round gauge from Ben Stoeger pro shop (money well spent even though not cheap).

 

I don't care. The 85% go in the big pile & the 10-15% go into the practice only pile. Can't remember the last time that I had any issues with rounds from either pile. 

 

Dies wise, I have the EGW size die as well as the Lee U die, they are both fine but I prefer the former. EGW seems to give the same amount of improvement but with less effort.