Sport Pistol 9mm 115gr minimum charge?

[fmiller4]

Hi!

I did a ladder test yesterday with (new to me) Alliant Sport Pistol and Barnes 9mm 115gr bullets. I did the test with a Tanfoglio Witness Match if that matters...

My best group (25-yards, sandbag rest) was at 3.8 grains, which was the minimum that I tested. I'd like to try lighter loads to see if the groups get even smaller.

Have any of you gone lighter than this? If so, do you mind sharing your data and/or experience?

Thanks~!~

 

[mdi]

I didn't find data for a Barnes 115 gr TAC-XP with Sport Pistol, but on the Alliant site or the Barnes site but there are Alliant loads using Sport Pistol for other types, FMJ and JHP bullets. But I might decrease loads perhaps .4-.5 gr until I saw erraric burn/ignition or loss of gun function. From what I saw, 3.8 gr. is the min or below minimum and I doubt if accracy would improve when going lower... My opinion only as I''ve not tried Barns bullets with Sport Pistol powder...

 

[CQB45ACP]

I use Sport Pistol @4.5gr with 115gr plated or FMJ. (In a range of 4.2-5.0). I’ve never seen any published data going below 4.0gr and that’s Speer’s for their 115gr TMJ.

 

[lordpaxman]

I don’t have any load data for SP and 115’s, just interested in the thread.
I’ve developed loads that went below published min, but it had a shorter COL than published, and I had a chrono to assist. Good luck.

 

[CoalCrackerAl]

Sport pistol data runs close to tite group. When i 1st started to use it. I worked with T.G data for loads that were not published for Sport pistol. As always start at beginning loads and work up. I bought Speers latest manual. It has data for S.P. And it co-sided with what i was working with.

 

[rfwobbly]

These are all Max Load, which places the suggested Starting Load around ~4.2gr. But you want to go lower than 3.8gr.

I believe you'd be in trouble with the recoil springs in your gun before anything else. As it is now, at 3.8gr the cartridge cases must be rolling down your arm.

 

[Darren57]

I've gone down to 3.5 SP with fps of 1040 using Hitek coated 125 grain with excellent accuracy with a Glock 17L,

 

[Soonerpesek]

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