small primer .45 acp
- Thread starter easysauce
- Start date
notsorichguy
CGN Ultra frequent flyer
- Location
- The city that rhymes with fun
Yup
mmcintyre1220
CGN frequent flyer
- Location
- Tillsonburg, Ontario
I picked up a bunch of theese. I loaded them the same as the large primer with the same results. I now seperate them and load them all at once. I never pick them back up tho lol.
- Location
- Nova Scotia
Good reloading practice dictates you should re-develop the load recipe since one of the ingredients has changed. In my personal experience I've found the Winchester small pistol primer (WSP) versus their large (WLP) produces a lower muzzle velocity with all other variables kept constant.
I like to keep a healthy supply of the ACP small pistol primer brass handy because occasionally large pistol primers are hard to acquire while small pistol primers seem to always be available.
I share the following results recorded in my reloading log book for demonstration purposes only, these loads were developed by starting with a carefully reduced powder charge and gradually working up while checking for overpressure signs. You must work up your own loads from scratch to accommodate your particular firearm and components; YMMV.
Firearm: G21SF
Distance: 12'
Bullet: Aim Bullets 230gr RN hard cast copper plated
Powder: WIN231 (repackaged lot number 388)
COAL: 1.208" (average)
Brass: Federal
Rounds: 10
WLP:
charge (gr) / max(fps) / min(fps) / mean(fps) / std (fps)
5.0 / 751.3 / 718.0 / 732.8 / 11.18
5.45 / 843.2 / 803.1 / 822.5 / 15.09
WSP:
charge (gr) / max(fps) / min(fps) / mean(fps) / std (fps)
5.21 / 741.6 / 700.3 / 725.5 / 14.35
Note: charge weights are the average of ten powder charges.
In this particular case it is appropriate to apply a linear approximation to the WLP data for the purposes of performing a comparison between WSP and WLP because additional chronograph data supports the assertion that this combination of components is operating within a near-linear range of powder charge versus velocity.
Would expect 5.21gr with WLP to yield a mean velocity of 774.7fps (interpolated) versus WSP mean of 725.5fps (measured).
Edited to correct grammar
I like to keep a healthy supply of the ACP small pistol primer brass handy because occasionally large pistol primers are hard to acquire while small pistol primers seem to always be available.
I share the following results recorded in my reloading log book for demonstration purposes only, these loads were developed by starting with a carefully reduced powder charge and gradually working up while checking for overpressure signs. You must work up your own loads from scratch to accommodate your particular firearm and components; YMMV.
Firearm: G21SF
Distance: 12'
Bullet: Aim Bullets 230gr RN hard cast copper plated
Powder: WIN231 (repackaged lot number 388)
COAL: 1.208" (average)
Brass: Federal
Rounds: 10
WLP:
charge (gr) / max(fps) / min(fps) / mean(fps) / std (fps)
5.0 / 751.3 / 718.0 / 732.8 / 11.18
5.45 / 843.2 / 803.1 / 822.5 / 15.09
WSP:
charge (gr) / max(fps) / min(fps) / mean(fps) / std (fps)
5.21 / 741.6 / 700.3 / 725.5 / 14.35
Note: charge weights are the average of ten powder charges.
In this particular case it is appropriate to apply a linear approximation to the WLP data for the purposes of performing a comparison between WSP and WLP because additional chronograph data supports the assertion that this combination of components is operating within a near-linear range of powder charge versus velocity.
Would expect 5.21gr with WLP to yield a mean velocity of 774.7fps (interpolated) versus WSP mean of 725.5fps (measured).
Edited to correct grammar
