Key holing 9mm

R

Randyralph

New member
I'm looking for some help again. As some of you know I've been trying to develop a new load for my 9MM Beretta 92, using different powders that I could find. Last week I found some Tite Group and tried the following loads.
Lee TL-356-124-TC over 3gr up to 3.5 gr working in .1 gr intervals, loaded to an AOL of 1.060". Shouting at 10 yards all boolits key holed.
The same boolit over Red Dot, unique, or Clay work just fine.
Anyone have any suggestions.
Thanks
 
I would start out by slugging the barrel.
9mm have a wide variance in barrel dimesions.
Also 3.5 grains of titegroup maybe a little low and not allowing the bullet to obturate properly.
 
obviously, if it was fine with the other powders, you need to up your charge.....it's that and your mold though.....are you talking about the 356-120-tc by chance? if so, it's a terrible mold with such little bearing surface, it's darn near impossible to keep it straight. my most inaccurate 9mm mold ever, although I can't recall any keyholing. if its the 124-tc, then I am not familiar with that exact one. the lee round nose 125 is just fine, but the real accurate 9mm mold is the 358-125-RF, I know its for a .38 but size it to 356 if you want, it does even better sized to 357 though, but either way, it has nice long sides and is a straight shooter from a 9mm. with yours I would up your charge though, although I found it very inaccurate, it wasn't so bad where I couldn't keep it in 5" at 10 yards or so.
 
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