View Full Version : Puma 45LC case buldge
Anyone run into sticky extraction with there puma? Anything over cowboy load levels im getting some case buldge down by the rim. Win cases, 8 grains tightgroup, 255 grain cast, seated to 1.59 AOL. Same with 9 grains of Unique. Any suggestions on what may be causing this? Different powder, too big of chamber. Thanks.
Marshal Kane
02-20-2008, 01:02 PM
Some of this may be normal. Your charges seem to be in the ballpark. I experience some case bulge in both my '92 ASM Winchester clone and ASM Colt SA but I don't have sticky extraction. The carbide sizer die brings the case back to it's usual "hour glass" shape again during reloading. Unless you have a pronounced bulge, I'd be a little more concerned about the sticky extraction. Do you clean your '92 often? Wondering if it could be a carbon buildup that could be removed with some Hoppe's.
fivedog
02-20-2008, 03:52 PM
i shoot both of these loads in both of my 92's
have you looked at the side of your cases
see that black streak
i've been " neck sizing" for mine seems to work for me.
i would clean the chamger with some hoppes
Thanks guys, Shes clean, maybe just a rough chamber. Noticed some fine scratches on the brass. Thing is, if I bump the loads up 2 grains the whole case expands uniformly, still drag on the way out though. The loads listed in my first post bulged on one side down at the rim. May try some H-110 and fill the case more and see what happens. Lee carbide sizing die possibley sizing on the small side? Thanks for the input.
Marshal Kane
02-21-2008, 09:03 AM
Don't know what brand of brass you're using. If Starline, it is some "beefy" brass. Starline casemouths are a bit thicker than the others suggesting that the casewalls are thicker also. With a heavy charge, there may not be enough "spring-back" leaving the case stuck to the chamber walls after firing. Rather than bumping up your loads, I would try reducing it a tad just to the point where the cases extract cleanly and go up from there if you feel the need. My '92 loads are set up for accuracy so they're always under "max". I'm a happy camper if I can get tight groups at 50 yards and beyond. I use any and all brands of brass without experiencing any stickyness during extraction.
A bulge in fired brass should appear nearly uniform around the circumference as pressure, after ignition, pushes equally in all directions . If your brass bulges on one side only, IMO, it's an indication that either the brass is softer or the casewall is thinner there. Bet this probably shows up only on a few cases while the others appear uniform? Hope you get that '92 working the way you want it.
fivedog
02-21-2008, 07:00 PM
i noticed the same thing today shooting some 240's with 8 gr t-group
had some 200's with 6 gr t-group and cases didnt have this noticeable bulge
the 8 gr load is 2gr under max but was trying to run my 45 -250 load and my 44-240 load to approx the
same velocity @ 1300 fps and my 44 looks about the same as the 45
no problems extracting but still slight case burned streak.
this is a very accurate load in both rifles and you can pick either one up
and use the same sight picture with either 200 220 or 240-250
out to about 75 yds
i may look for a bit more velocity but am playing tag here as my bro-inlaw is
keeping pace with his 45. its a clone to mine so not too bad
but i am trying to use a fairly soft cast bullit bhn approx 9-10 and no gas check and see just what velocities. i can get we use these for heavy brush guns and want to get some deformation
in the boolits and so far the only way we are getting it is to hollow point.
but could not figure just how we wanted to h-point these i.e. large shallow stepped
and finally decided to see how fast we could get these and have decent accuracy at 50-75 yds
and just let them deform
as i was not seeing much mushrooming with the 250-xtp but the deer were dead
thought i could improve my situation
we will see
Marshal Kane
02-22-2008, 08:19 AM
Plan B: Rod, try other brands of cases with your current load. See if any will function without sticky extraction. If the problem persists, try a slightly lighter load. If this doesn't help, email Steve the '92 gunsmith.
Thanks Marshal, Using Win cases. If there like my 45-70 cases there on the thin side. Fivedog, Been loading mister-cast I had on hand with bhn of 14 and 8grn of t-group leaded slightly. 9 grains was very accurate but had too much leading and I hate cleaning that stuff out of the barrel.
fivedog
02-22-2008, 07:19 PM
i've tried those meisters it was in my 44-40 and they were right at barell diam
but ones i'd cast myself .001 under sized actually shot better and didnot lead
these were left over from another project.
but sometimes [most of the time] a softer boolit is the way to go.
untill prices sky rocketed on pre-made jobs i would buy them add 2 percent more tin and make
boolit for my rifles out of them [ this makes them slightly harder then the lyman #2 mix]
but it looks like i am getting about the same results as you right now.
i think that i will try a slower powder here.
my 44 is showing a tendency for a bit of leading near the muzzle
as this is a new gun i yhink it has a little roughness on one of the lands it always seems to have a little grey wash in the same place.
a little hoppes left in the barell for a few mins a quick brushing and patch it right clean.
the 45 looked good yesterday. so iyhink i will take it up to 9.0 with the
tightgroup load.
hpdrifter
02-22-2008, 09:18 PM
I bought a Puma 45 colt about 3 years ago now, and it bulged the cases awful. the ramp into the chamber was way too deep. I got mine replaced thru warranty.
WyrTwister
03-17-2008, 07:45 PM
Anyone run into sticky extraction with there puma? Anything over cowboy load levels im getting some case buldge down by the rim. Win cases, 8 grains tightgroup, 255 grain cast, seated to 1.59 AOL. Same with 9 grains of Unique. Any suggestions on what may be causing this? Different powder, too big of chamber. Thanks.
I have only shot my .45 LC once . Sis not notice if the cases buldged or not .
If the chamber is rough , try polishing it with the finest steel wool you can fine , wrapped arounf the end of a wooden dowell rod ( spun with an electric drill motor ) . Use plenty of oil . When finished , flush the chamber and bore very clean .
God bless
Wyr
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