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Disappointed with Zero 185gr SWCHP

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Disappointed with Zero 185gr SWCHP - Page 2 Empty Disappointed with Zero 185gr SWCHP

Post by MkFiji Wed May 08, 2024 6:25 am

First topic message reminder :

Load:

Zero 185gr SWCHP
Starline brass
4.0gr BE
0.920" Shoulder to base
0.6975" Taper crimp


Results: Same recoil or more than 185gr Atlanta Arms!

SA 1911 Target Loaded
Kart XACT Fit
14lb Wolff Recoil Spring
18lb Cylinder-Slide Mainspring


I shot two timed and a rapid fire sessions with Atlanta Arms.  Come around to SWCHP and that recoil was a surprise!!  I've read that it's softer but not at this load and specs! What's even more surprising is that the Garmin Xero C1 says SWCHP was 50fps lower than Atlanta Arms

Is it because of the 0.005 tighter crimp? I" went a little tighter based off recommendations to try a tighter crimp and this is no where close to 0.694

What do you guys think?




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Last edited by MkFiji on Wed May 08, 2024 3:58 pm; edited 2 times in total

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Disappointed with Zero 185gr SWCHP - Page 2 Empty Re: Disappointed with Zero 185gr SWCHP

Post by Dcforman Thu May 09, 2024 9:50 pm

Your numbers check out velocity wise. Maybe switch to a slower powder? I load WST for nearly everything. Much more a push than a snap. I like it a lot. YMMV.

My load for 185 SWCHP is 4.1 WST with a tight crimp, 0.464.

Dave

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Disappointed with Zero 185gr SWCHP - Page 2 Empty Re: Disappointed with Zero 185gr SWCHP

Post by MkFiji Thu May 09, 2024 10:22 pm

Although the FPS on the 3.65gr 185 SWCHP is lower than the 4.3gr 185 JHP, it sure does eject casings FAR!


So it has a higher recoil and ejects further than a jacketed load at a higher charge—could this be a spring thing?


Last edited by MkFiji on Thu May 09, 2024 10:39 pm; edited 1 time in total

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Post by MkFiji Thu May 09, 2024 10:23 pm

Dcforman wrote:Your numbers check out velocity wise. Maybe switch to a slower powder? I load WST for nearly everything. Much more a push than a snap. I like it a lot. YMMV.

My load for 185 SWCHP is 4.1 WST with a tight crimp, 0.464.

Dave

I’ve never used anything other than BE.   Do you have a load for the long line or is that 4.1 a load you use for both long and short?

MkFiji

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Disappointed with Zero 185gr SWCHP - Page 2 Empty Re: Disappointed with Zero 185gr SWCHP

Post by Dcforman Thu May 09, 2024 10:42 pm

I use it for both short and long line. I actually use it for both service pistol and match pistol now, since lead is legal. Only have one load for everything! Never have to touch my settings on my Star.

Equivalent-ish velocity to 3.8 Bullseye. 

Dave

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Disappointed with Zero 185gr SWCHP - Page 2 Empty Re: Disappointed with Zero 185gr SWCHP

Post by MkFiji Fri May 10, 2024 3:04 pm

Wobbley wrote:In my testing, I loaded 4.4 Bullseye with 185 JHP and got the same results as the Atlanta Arms results you showed, 790 fps.  Which I found to be ,OK for recoil.  My load for 185 cast SWC is 4.3 which gives the same velocity.  So the recoil is very similar.  My load for 200 is 4.0 but I’ve loaded 3.8 and they shoot so close in recoil not enough to notice.  Those velocities is 700.  I’m at a loss for your crimp dimension.  For my lead loads in hard cast .466 and ,464 for soft swaged.

What specs do you use to load for 790FPS /w 185JHP? This is just for my curiosity in understanding cartridges

Disappointed with Zero 185gr SWCHP - Page 2 Img_5321

To attain that FPS I load:

Brass:      Starline(new or used)
Bullet:     Zero 185JHP
Powder:   4.7gr BE(newer bottle)
Crimp:     0.469"  Measured /w narrow blade flushed /w edge
OAL:       1.999"-1.203"
Primers: CCI LPP

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Disappointed with Zero 185gr SWCHP - Page 2 Empty Re: Disappointed with Zero 185gr SWCHP

Post by rich.tullo Sun May 12, 2024 12:59 pm

I find those bullets very accurate and should sub 2 inch group at 50 yards out of a properly fit Kart barrel at 50 yards, 

I load them 3,8 to 4,0 BE  on a scoped RA with a Kart barrel. 1.23 to 1.24 col
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