Disappointed with Zero 185gr SWCHP

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?

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

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?

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?

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

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



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

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