45 acp with CCI sp primers


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howelljeffrey
April 9, 2010, 12:43 AM
I have a lot of small pistol primers so I bought some 45 acp brass with small primer pockets. I have load data for Power Pistol loads but everything uses large pistol primers. Can anyone tell me how or if I need to adjust my charge? Would I need to bump it up? Thank you.

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ReloaderFred
April 9, 2010, 12:45 AM
Just load as usual. I use the same loads for small primed brass as I do for large primed brass.

Hope this helps.

Fred

ChristopherG
April 9, 2010, 12:50 AM
Are you the one leaving this stuff around the range? It drives me crazy when it gets mixed in my precious range pickings.

Sorry, but I don't actually have data to answer your question. I would assume it would make a small difference, how small depending on what powder you use. With a fast-burning powder like you'd use for a target load, I would expect it to be a VERY small difference--as in so small I would try your regular load and see if you can tell any difference. I'm betting you can't.

If you're running hot loads of power pistol or some other medium-burn rate propellant, I'd guess you might have to work back up to your target velocity--but I wouldn't see why you'd have to back down. I mean, it's going to be a reduction in pressure, though a small one.

Hopefully someone will have an answer from a book for you.

Alabama2010
April 9, 2010, 01:23 AM
I've read quoted on this forum that you'll get ~30-50 fps less with the small primer. I don't have a chrony yet, so I can't vouch for that. I do load the small primer cases though using load data for large primers. Haven't had any problems, but I only loaded up to mid-load charges. Works out great for me too since I also load 45 GAP.

ArchAngelCD
April 9, 2010, 02:41 AM
I don't see any real difference in velocity when using brass that takes a SPP or a LPP in the .45 Auto. It may make a difference with some powders though, if it's a hard to ignite powder you may see a slight change. (that's just a guess) I use W231 mostly and even when I use Clays or AA#5 I see no change in velocity to speak of.

FROGO207
April 9, 2010, 09:01 AM
I have seen no appreciable velocity difference with large or small primers with my 45 loadings at all. I do use bluedot mostly.

howelljeffrey
April 9, 2010, 10:27 AM
Thank you for the replies.

frankge
April 9, 2010, 11:11 AM
I use both and cant really tell difference. I used PMC SP primers though

bds
April 9, 2010, 11:14 AM
I have been sorting out the 45ACP brass with small primer pockets so they don't get mixed in with my larger primer pocket cases (messes up the hand priming flow while watching TV :D).

Not sure what I plan on doing with them - maybe raffle them off?

EddieNFL
April 9, 2010, 11:32 AM
I throw 'em in the scrap brass can.

ArchAngelCD
April 14, 2010, 04:28 AM
The May 2010 Shooting Times has a good article on small vs large primers in the .45 Auto. It's part of the Practical Shooting column on page 20.

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