My first inaccurate .40 load (Berry's 180 FP, American Select)

[LiveLife]

That's why I always verify accuracy consistency by conducting multiple range tests. If the accuracy is repeatable on 2-3 range tests, I would deem that load accurate. If the accuracy is not repeatable, I conduct further tests.

As you saw on the Herco threads, sometimes a small shot group may be a fluke and can't be repeated while most other shot group trends are repeatable.

 

[1KPerDay]

That's good practice. I usually get bored shooting for groups and figure "meh... it's good enough."

 

[Mad Chemist]

"Yes it is fast. Since the pressure has to be high for it to work well you should shelve it and use it only for fmj."

I strongly disagree. Light charges of fast powders are a perfect combo for cast lead or plated bullets. Umpteen thousands of shooters have been shooting cast bullets with powders like Bulleye and AA#2 with great success for many decades.

 

[Walkalong]

Yes, but in general the .40 has proven to give better accuracy with medium speed powders vs fast.

 

[1KPerDay]

Some final feedback on this load (6.0 Herco 180 Berry's FP, Tula primers, 1.14"-1.145" OAL)...

Results seem confirmed to be very good! Shot a few hundred of these with my brother yesterday, steel plates at 16ish yards, and was getting very consistent hits at POA. He with his Gen 3 G22, me with my Gen 3 G23 and Storm Lake barrel. No malfunctions, even with my Storm Lake barrel which gave me FTFs occasionally with Berry's 180 FP loaded to 1.125".

Re-confirmed that 1.14-1.145" loads do indeed pass the plunk test in OEM Glock gen 3 barrels. Brass all looked good, no smileys or primer issues or bulging.

Thanks again bds! Saved me from continued frustration.

 

[LiveLife]

You are very welcome. Glad I was able to help.

I love happy endings.