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9mm Ransom Rest Tests

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S148
james r chapman
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Post by Dr.Don 1/6/2020, 12:46 pm

A couple of years ago I built a full custom 9mm using one of the then new Clark 10-twist barrels.  The idea was to develop a 9mm gun/load combo that mimics the ballistics of the 38Sp wadcutter load. Doing that required 147gr bullets at about 700-750fps, hence the choice of a 10-twist barrel.  That worked out ok, as shown by one of the test groups below using my bullseye load.  For these current tests I put a heavier recoil spring in place and shot some full power loads using both Atlanta Arms ammo and some reloads.  All targets were shot at 50yds and are shown with an X-ring/10-ring overlay.  The gun, by the way, is currently shown in my Avatar.  I apologize for the improper rotation of one of the pics; I couldn't find a way to rotate it once inserted.

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Post by watercam 1/6/2020, 12:52 pm

Thank you for your results. Thinking about the same idea. Have you tried Silhouette?

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Post by Dr.Don 1/6/2020, 12:56 pm

No, I have never used Silhouette in anything.
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Post by james r chapman 1/6/2020, 1:28 pm

Silhouette was used by
Many of the Border Patrol guys in their 9mm 1911’s
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Post by S148 1/6/2020, 7:22 pm

Several loads are 10-ring capable at 50 yards in a great pistol!  Awesome.

I'm reminded of the videos that Accuracy-X posts that show 1" groups at 50 yards. Anyone know what load they're using?

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Post by james r chapman 1/6/2020, 7:53 pm

S148 wrote:Several loads are 10-ring capable at 50 yards in a great pistol!  Awesome.

I'm reminded of the videos that Accuracy-X posts that show 1" groups at 50 yards. Anyone know what load they're using?
generally Atlanta Arms 110 gr loads..
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Post by S148 1/6/2020, 8:27 pm

james r chapman wrote:
S148 wrote:Several loads are 10-ring capable at 50 yards in a great pistol!  Awesome.

I'm reminded of the videos that Accuracy-X posts that show 1" groups at 50 yards. Anyone know what load they're using?
generally Atlanta Arms 110 gr loads..
I can't find a 9mm with 110 grain bullets on their website, just 100 and 115 grain in that weight range. Anyone know about their 110 grain load?

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Post by kc.crawford.7 1/7/2020, 6:36 am

The AA 110gr load is gone.  They stopped a couple of years ago.  Steve had a "test" lot of it.  But Atlanta didn't produce it fully for the public.
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Post by JIMPGOV 1/7/2020, 7:14 am

I FOUND THE MOST ACCURATE 147GR LOAD AT 50YDS WERE THE FOLLOWING.. RANSOM REST TESTED IN MANY CUSTOM 1911's ( ROCK RIVER ARMS, TONY KIDD, SAMS), S&W PPC9's. ACCURACY WAS AROUND 1 INCH ON GOOD GUNS AND 1.75 INCH ON THE OTHER END .

147GR XTP 4.2 GR VV330, FED SP, NEW STARLINE BRASS, OAL 1.142"
147GR XTP 4.0 GR WW WSF, FED SP, NEW STARLINE BRASS, OAL 1.142" 

THE XTP BULLET A 50 YDS WAS THE MOST ACCURATE OF ALL. EXPENSIVE BUT WORTH IT. IT'S A BOAT TAIL BULLET. FOR THE SHORT LINE HORNADY SELLS IN BULK A BOAT TAIL 147GR FMJ. IDEAL FOR THE SHORT LINE. THE HORNADY 147GR FMJ USES THE SAME JACKET MATERIAL AS THE XTP. NO BARREL FOULING ISSUES WHEN SWITCHING BETWEEN THE 2 BULLETS. THE 147GR FMJ GROUPED ABOUT 2.5" AT 50YDS.

NEW BRASS AT 50YDS, ANY BRASS FOR THE SHORT LINE.
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Post by Bigtrout 1/7/2020, 7:18 am

Dr. Don do you have COL data for those loads?
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Post by Wobbley 1/7/2020, 9:39 am

Have you tried 5.3 CFEPISTOL with a 115 grain?  That shot very well for me in short range pistols.
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Post by Dr.Don 1/7/2020, 12:48 pm

Bigtrout,
COL data is as follows:
- 125 Sierra load -- 1.144
- 147 with CFEP load -- 1.098
- 147 with BE load -- 1.065
- Atl Arms 115 FMJ -- 1.106
- Atl Arms 147 JHP -- 1.099

Wobbley, I have not shot any CFEP with 115gr bullets yet.
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