Thursday, December 5, 2013

357 Sig and 10mm = best compromise of capacity, KE, and control

I have shot those guns, I own them; that data was obtained from my chronograph.

I've also shot them using a shot timer, so the PF calculation has been tested and subjectively confirmed in my hands.

Not being especially fast about anything I do, my 2nd shot times may not seem very impressive; however, I do very likely have a more rigid criteria for what constitutes a good or "qualifying" 2nd shot than others would accept.

I put a 6'' circle on a larger target about 6 - 7 yards away.
Both 1st and 2nd shot must hit the 6'' circle, close to the 6'' circle does not count. This is a very important point to remember, a perfectly good hit 1'' above that circle will not be counted or it would ruin the validity of any comparison. I can pull the trigger faster, but keeping both shots on the 6'' circle becomes increasingly difficult.

I've obtained consistent averages on different days, so I'm confident that the averages are representative of my performance with different pistols, using the given ammo.

My subcompacts (26, 27 and 33) all have a Pearce +0 magazine base that provides a place for my pinky.

Using the 26 (9mm):
.28 sec average from 1st - 2nd shot with a standard pressure 115 gr. JHP
.31 sec average with Ranger T 124 gr. +P

Glock 27 (40 S&W)
.29 one day, .32 average on another, both times with relatively mild kicking Rem 180JHP; the time would definitely increase with a hotter round like Ranger T 165 like I used for the PF calculation in my initial post.

Glock 33 (357 Sig)
.32 one day with a 147 gr. XTP, .31 average on another day with 125 gr. Gold Dot.

Notice that there is essentially no difference in my 1st - 2nd shot average time between the 9mm +P and the 357 Sig (maybe because I'm slow either way).

With the Glock 29 SF and Hornady 155 gr. XTP I averaged .34 sec (not bad considering the size of the pistol and the power produced).

The 1911 was good for a very respectable .23 sec average.
The Glock 32 in 357 Sig essentially a match at .25 average using Ranger T

None of my data is speculative.


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