ASSRA Forum - Fixed cartridge won't chamber in CPA

ASSRA Forum › General › Reloading the Single Shot Rifle › Fixed cartridge won't chamber in CPA

(Moderator Group: Moderator)

‹ Previous Topic | Next Topic ›

Page Index Toggle

Pages: [1] 2

Hot Topic (More than 10 Replies)

Fixed cartridge won't chamber in CPA (Read 11557 times)

Brudford01 Full Member Offline Posts: 196 Location: Beaver Falls PA Joined: May 18^th, 2008	Fixed cartridge won't chamber in CPA Aug 6^th, 2015 at 7:26pm	Print Post
	I was forming some 32-40 brass from 30-30 cases today with a new set of RCBS Cowboy dies . In order to get a complete fire form I wanted to load some fixed ammo . The pressure from a seated bullet will create a better fire formed 32-40 .Not only will the 30-30 cases not chamber nor will the 32-40 cases chamber . Are these CPA chambers cut that small for breech seating only . My bullets are @ .322 " Full length resized, just enough case flare to start the bullet. There appears to be no bulge in the case from the bullet . I took a flared case only without seating the bullet and the flared empty case would not chamber ? Winchester brass also . Thanks


	IP Logged

RayH Oldtimer Offline Posts: 757 Location: Oldest City, FL Joined: Jan 4^th, 2012	Re: Fixed cartridge won't chamber in CPA Reply #1 - Aug 6^th, 2015 at 8:58pm	Print Post
	Your best answers will come via Paul & Gail. Don't hesitate to call them. Their after the sale service is 2nd to none. I speak from experience.

	In GOD We Trust
	IP Logged

UtahDave Senior Forum Member Offline Posts: 396 Location: Heber City, Utah Joined: Aug 14^th, 2010	Re: Fixed cartridge won't chamber in CPA Reply #2 - Aug 6^th, 2015 at 9:47pm	Print Post
	I second OkeyMaples suggestion. Have you made a chamber cast? I use reformed 30-30 in my 32-40 CPA with no problem. I haven't tried to use fixed ammo yet. I would guess the bullet would push back into the case if the bullet was a bit big. BTW I have shot double ought shot which I think is 0.33" dia or thereabouts for gallery loads, weird results. I was considering shooting these for fire-forming. Let us know what you find out. Dave


	IP Logged

Schuetzenmiester Frequent Elocutionist Offline Posts: 6707 Location: Cool Wet Side of WA Joined: Apr 27^th, 2008	Re: Fixed cartridge won't chamber in CPA Reply #3 - Aug 7^th, 2015 at 1:10am	Print Post
	Were you using a quick powder like Bullseye?

	"some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence
	IP Logged

frnkeore Frequent Elocutionist Offline Posts: 7730 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: Fixed cartridge won't chamber in CPA Reply #4 - Aug 7^th, 2015 at 2:24am	Print Post
	Will the cases chamber after running them through the die, all the way untill the the shell holder touches the die, w/o flaring them? Frank

	ASSRA Member #696, ISSA Member #339
	YIM AIM IP Logged

JLouis Frequent Elocutionist Offline Posts: 10625 Joined: Apr 8^th, 2009	Re: Fixed cartridge won't chamber in CPA Reply #5 - Aug 7^th, 2015 at 6:45am	Print Post
	I would first try a non flared case and if it does not fit I would paint the case with a magic marker to note just where on the case the tight spot is the neck area or the web. JLouis

	" It Is Better To Now Have Been A Has Been Than A Never Was Or A Wanna Be "
	IP Logged

gunlaker Frequent Elocutionist Offline Posts: 2690 Location: lower mainland, B.C. Joined: Dec 13^th, 2010	Re: Fixed cartridge won't chamber in CPA Reply #6 - Aug 7^th, 2015 at 9:28am	Print Post
	Bruford, in my .32-40 the chamber is pretty tight. I don't think I could use fixed ammunition unless the bullet was a bit undersized. When Russ Weber made my seater he reamed the case mouth on the inside in order to fit the bullet. Chris.


	IP Logged

John Boy Ex Member	Re: Fixed cartridge won't chamber in CPA Reply #7 - Aug 7^th, 2015 at 9:31am	Print Post
	Brudford - before you take J Louis's advice: * Take your FL sizing die and insure the bottom of the die sits directly on the top of the shell plate with the press arm fully extended * Then turn the die down an additional 1/4 of a turn * Run several cases through the die This will provide for full travel of the FL sizing die over the case web Then do as J Louis suggested


	IP Logged

calledflyer Frequent Elocutionist Offline Posts: 4035 Joined: Mar 9^th, 2015	Re: Fixed cartridge won't chamber in CPA Reply #8 - Aug 7^th, 2015 at 1:40pm	Print Post
	As John Boy suggests, the first sizing when I form from .32spl or .30-30 usually needs to be as far down as I can get with the die. My chamber isn't real snug, being factory Winchester, so any tighter chambering is going to make that especially neccesary. My take on it is that for the entire length of the case you need to rearrange the taper that was less on the shouldered versions. Any remaining original would show as a fat spot on the case not easily seen, but there none the less. And, like I say, my chamber isn't very snug at all. Don't forget the neck if yours is tight- Like J. Louis says, try the marker on the case, too.


	IP Logged

calledflyer Frequent Elocutionist Offline Posts: 4035 Joined: Mar 9^th, 2015	Re: Fixed cartridge won't chamber in CPA Reply #9 - Aug 7^th, 2015 at 1:52pm	Print Post
	Just for grins... What does a fired case neck measure? If it's much less than, say, your .322 bullet and about .018 you may have a minimum neck. Or thick brass. Not sure if that is always a good thing in a cast bullet rifle. Mine will still chamber a round using .323 bullets at the total size of .341 or .342. That's just a little fatter than the SAAMI measurement max. But it works in my chamber.


	IP Logged

JLouis Frequent Elocutionist Offline Posts: 10625 Joined: Apr 8^th, 2009	Re: Fixed cartridge won't chamber in CPA Reply #10 - Aug 7^th, 2015 at 8:54pm	Print Post
	If you find out your problem is in the wed area it is not unusual to have to grind off the top of the shell holder so the case can get further into the sizing die approx. another 20-50 thousands of which often times is just enough. This is a better approach than taking it off the bottom of die of which can open another can of worms. JLouis

	" It Is Better To Now Have Been A Has Been Than A Never Was Or A Wanna Be "
	IP Logged

boats Frequent Elocutionist Offline Posts: 7757 Location: Virginia Joined: Apr 23^rd, 2004	Re: Fixed cartridge won't chamber in CPA Reply #11 - Aug 8^th, 2015 at 2:56am	Print Post
	Quick way to see if the problem is in the web area, put a washer on top of the shell holder push the case all the way in your die. Knock it out with a steel rod and mallet. Problem is likely the die or cases. Sizing dies size the case walls well, they won't reduce size of the solid case head at the base much. Spot it sticks indicated by a marker painted case is the clue. Some headstamp .30 US cases size down to .25 Kraig for my CPA fine other brands need to be turned in a lathe just a bit at the web to chamber. Sizing die won't do the job. My 32/40 CPA barrel chambered for Breech chambers fixed fine. However my cases were formed from WW 38/55. Another brand case or one from 30/30 may or may not. Lot of variation one head stamp to another. Boats


	IP Logged

Brudford01 Full Member Offline Posts: 196 Location: Beaver Falls PA Joined: May 18^th, 2008	Re: Fixed cartridge won't chamber in CPA Reply #12 - Aug 8^th, 2015 at 5:13pm	Print Post
	Full length sizing die works fine . Brass will chamber . It is when you ever so slightly bell the case mouth just enough to seat a bullet that the case with or without a bullet will not chamber . That includes 32-40 Winchester cases as well . Breech seating with a case is fine . The only reason I'am even trying fixed cartridges is to get a better seal with the brass, a seated bullet will do that . After the case mouth is belled it measures .340 " which Paul Shuttleworth tells me is the diameter of his 32-40 CPA chambers . He recommends the Lyman M die for belling the case mouths ?


	IP Logged

frnkeore Frequent Elocutionist Offline Posts: 7730 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: Fixed cartridge won't chamber in CPA Reply #13 - Aug 8^th, 2015 at 5:30pm	Print Post
	First run the M die in the case mouth w/o touching the taper. See if it will chamber. If it does, turn the expander down 1/8 turn, at a time, after touching the taper and try it each time. Back off when it won't fit. Also, chamfer the case mouth as much as possible, with a 82 deg counter sink. Frank

	ASSRA Member #696, ISSA Member #339
	YIM AIM IP Logged

calledflyer Frequent Elocutionist Offline Posts: 4035 Joined: Mar 9^th, 2015	Re: Fixed cartridge won't chamber in CPA Reply #14 - Aug 8^th, 2015 at 6:43pm	Print Post
	If the .340 size is what the chamber is, your .322 bullet and brass ought to total that number- based on my brass from W-W and Western. So, if the flare is still added on you are just a tiny bit beyond that sum. I don't flare mine, just size minimally and use an 8mm expander ball. This to uniform the inside dimension for equal tension (I hope). Plus, I chamfer like Frank advises. My chamber, is of course, a little different than yours, but I think if you carefully seat the slugs in the chamfered case, like I do you may be able to get it done without the flare. Good luck, because my rifle has been shooting very nicely with fixed lately.


	IP Logged

Page Index Toggle

Pages: [1] 2

‹ Previous Topic | Next Topic ›

« Board Index ‹ Board Top

Top

ASSRA Forum » Powered by YaBB 2.6.12!
YaBB Forum Software © 2000-2026. All Rights Reserved.

Valid XHTML

Valid CSS

Powered by Perl

Source Forge

Page completed in 1.3300 seconds.