.32 ACP load data for 60gr SWC

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Post by orpheoet on 11/17/2018, 8:51 pm

I just loaded 20 rounds with 1.7gr N310. Functioned perfectly in my Pardini. I'm interested in everybody's proven loads for the 60 gr SWC. I know there's info scattered about on several posts, thats how I came up with the ones I loaded today. Any info greatly appreciated.
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Post by gregbenner on 11/18/2018, 12:14 am

I use that for long line loads, 1.35 gr n310 for everything else. This is with the 62/64 grain T&B SWC’s.

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Post by carykiteboarder on 11/18/2018, 9:49 am

With Hornady XTP 60gr JHP:  Desired velocity is 880fps (per Pardini USA shooters)
N310: 1.7gr or 1.8gr.  
Bullseye: 2.1gr 

Note: Hornady reloading manual (9th Edition) values for N310 were way off in my testing.  Specifically, measured muzzle velocities were MUCH different from those predicted by the manual.  Further, if you load 1.8gr, you are loading ABOVE the maximum listed load.  For me, that was below desired velocity but both 1.7gr and 1.8gr shot well from sandbags.  I aborted testing 1.9gr because within five rounds it was clear that the grouping was much worse.

On the other hand, numbers from the same table using Bullseye powder were totally consistent between predicted and measured.  (Tested the same day/time as the N310.)

For comparison, factory PMC Bronze ammo (60gr JHP) measured velocities were in the high 950's.  It's plenty accurate but has a little more snap than necessary.
Glen
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Post by fc60 on 11/18/2018, 12:00 pm

Greetings,

The "factory" loading manuals use SAAMI compliant barrels for testing.

The Pardini 32 ACP is NOT SAAMI compliant.

The Pardini barrels are 0.314" groove diameter.

The cartridge head spaces on the case mouth, not the case rim, with the Pardini barrel.

The data in the manuals is useful for velocity. If you do not exceed the published velocities with your hand loads, chances are you are good to go. (Pressure = Velocity)

Again, the Chronograph is your friend.

Cheers,

Dave
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Post by orpheoet on 11/18/2018, 11:21 pm

Well, I had good results with 1.5gr N310, 0.84 COL and 0.335 crimp.
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