tires2burn Posted November 20, 2012 Share Posted November 20, 2012 I have been loading Rainier 230RN and 200SWC. No problems but wondering how much crimp is needed. When I first started I had to much and it cut into the plating. I backed it off till I just have a faint ring around the bullet. Should it be tighter? I can't push the bullet in so think I'm on the right track. Any advise appreciated. Link to comment Share on other sites More sharing options...
Youngeyes Posted November 20, 2012 Share Posted November 20, 2012 There shouldn't really be any ring. The bullet is held by the brass and not held in by the edge. As long as you get no bullet set back, and it runs in your gun, you're good to go. Link to comment Share on other sites More sharing options...
Steve RA Posted November 20, 2012 Share Posted November 20, 2012 Just make the sides of the cartridge parallel, case tension is what is supposed to retain the bullet in place. Link to comment Share on other sites More sharing options...
Powder Finger Posted November 20, 2012 Share Posted November 20, 2012 all you want is to get rid of the bell mouth take calipers and snug up behind the bell, when you can just slide the case off the calipers your good. remember when you crimp the brass has spring back, so if you crimp too much you size the brass and bullet but the brass then expands a little so now your bullet fit is looser not tighter. Link to comment Share on other sites More sharing options...
tires2burn Posted November 20, 2012 Author Share Posted November 20, 2012 Thanks guys, just the info I wanted. Link to comment Share on other sites More sharing options...
GregJ Posted November 20, 2012 Share Posted November 20, 2012 I've found that a crimp measured at .4695 - .4705 works very nicely in my Kimbers. If it gets up to around .472 and .473 I would get a lot of 3 pt jams. Link to comment Share on other sites More sharing options...
GBertolet Posted November 23, 2012 Share Posted November 23, 2012 .469 to .470 at the case mouth is pretty much the accepted standard for the 45 ACP. Link to comment Share on other sites More sharing options...
fatman73 Posted November 25, 2012 Share Posted November 25, 2012 I was crimping at 471 but snugged it to 469 and i think it really made a difference for me. but thats with cast not plated i only load lead as of now good luck Link to comment Share on other sites More sharing options...
ltdmstr Posted November 25, 2012 Share Posted November 25, 2012 SAAMI spec is .473". More crimp is not a good thing. If you crimp to .473" and can push the bullet in with moderate pressure, you need a smaller sizing die. Link to comment Share on other sites More sharing options...
gashooter Posted December 8, 2012 Share Posted December 8, 2012 (edited) Just what Powder Finger said "all you want is to get rid of the bell mouth". Edited December 8, 2012 by gashooter Link to comment Share on other sites More sharing options...
BDD Posted March 1, 2013 Share Posted March 1, 2013 I have been using ~.470 crimp with no problems Link to comment Share on other sites More sharing options...
ChristianHE Posted March 11, 2013 Share Posted March 11, 2013 Just one more... Since 45 ACP headspaces to the case, I use just enough taper to get rid of the belling and so they easily fit my cartridge gauge. Link to comment Share on other sites More sharing options...
Steve RA Posted March 12, 2013 Share Posted March 12, 2013 I think if you put an empty case in your barrel (chamber) you will discover that they don't really headspace on the case. Generally, you will find that end of the case a fair amount of distance ahead of the end of the barrel hood. Link to comment Share on other sites More sharing options...
Buzi Posted March 12, 2013 Share Posted March 12, 2013 I think I smell a confusion with terminology. I'm sure he meant to say... the 45acp head spaces on the rim of the case. That would be a more accurate description. It is a tiny ledge for sure inside the barrel we all rely on. I just peered into a ancient spare 1911 model barrel I have laying near my press. That 1911 old barrel is my head space gauge. Once in a while for grins I check using one of my Springfield barrels. The 1911 barrel I use is from a 1911 ACP my grand pap had bought for his personal use prior to the Great War, the war to end all wars. So I'm sure it is to original spec....... Back then officers bought their own sidearms like that , so I understand. Link to comment Share on other sites More sharing options...
Steve RA Posted March 12, 2013 Share Posted March 12, 2013 Considering that the .45ACP is a rimless case, I'm pretty sure it doesn't headspace on the rim. The original .38 Supers and .38 Autos headspaced - or were supposed to - on the semi-rim they have and were pretty inaccurate. The .45ACP is supposed to headspace on the mouth of the cartridge against the front end of the chamber, however, most are shorter than the specs call for (the cartridge cases) and you will end up with what I described previously. Link to comment Share on other sites More sharing options...
Buzi Posted March 13, 2013 Share Posted March 13, 2013 Sorry, I had major brain fart. I meant to say mouth. Link to comment Share on other sites More sharing options...
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