Paper Patch Chamber

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J.Murphy
Posts: 119
Joined: Mon Apr 01, 2013 3:14 pm

Paper Patch Chamber

Post by J.Murphy » Mon Nov 11, 2019 6:55 pm

I am interested in shooting paper patch, but could not find through the search engine, a description of what constitutes a paper patch chamber versus a grease groove chamber, if there is any great difference. Any help would be appreciated.
J.Murphy

BFD
Posts: 2789
Joined: Mon Jan 21, 2008 7:36 pm

Re: Paper Patch Chamber

Post by BFD » Mon Nov 11, 2019 7:29 pm

J.Murphy,
There are a million opinions of what makes a paper patch chamber different than a grease groove, but basically, the effects are tiny at best. If there is one somewhat unifying notion, it is that paper patch chambers for target bullets are very tight - often too tight for grease groove bullets to chamber. But paper patches in a standard chamber intended for groove+ diameter grease groove bullets, will shoot paper patches very well.

Bottom line is that whatever chamber you have, is good enough for paper patching. Go for it!

Kurt
Posts: 8002
Joined: Wed Oct 12, 2005 10:28 pm
Location: Not Far enough NW in Illinois

Re: Paper Patch Chamber

Post by Kurt » Mon Nov 11, 2019 8:34 pm

You can shoot bore diameter and groove diameter PP bullets they both shoot well but you will loose powder capacity shooting a groove diameter and this can get to be an issue with small capacity cases when you get to longer ranges.
I like tight chambers and longer funnel types of leads. It's a personal choice.
The reason a dog has so many friends is because he wags his tail instead of his tongue.

"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery"Winston Churchill

beltfed
Posts: 1842
Joined: Sun Jun 03, 2007 10:07 am
Location: Central Wi

Re: Paper Patch Chamber

Post by beltfed » Mon Nov 11, 2019 9:44 pm

BUT, you do not need to lose case capacity with a GG bullet IF it is a two diameter design
as the base band/ bands can be fire formed case/"groove" diameter and the front bands can be bore diameter and
so they can be seated way out.

That being said, do not forget about the DDEPP/ two diameter PP bullets that work very well in std GG chambers.
Same deal short Base band "patch to fireformed case I.D./freebore/groove dia
and body at "patch to bore/lands" diameter. typically seat way out with only maybe 0.1-0.125" into the case
similarly to the dedicated tight neck chamber to use straight sided patch to bore bullets.
Nice about the std chamber: can shoot BOTH the 2 diameter GG and the 2 diameter PP bullets Well.
beltfed/arnie

beltfed
Posts: 1842
Joined: Sun Jun 03, 2007 10:07 am
Location: Central Wi

Re: Paper Patch Chamber

Post by beltfed » Mon Nov 11, 2019 9:47 pm

Oh, there are a number of 40 and 45 caliber DDEPP/two diameter PP bullet molds
listed, described and illustrated in the Buffalo Arms Catalog.
beltfed/arnie

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