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32/40 brass question (Read 15762 times)

bwgdog Ex Member	32/40 brass question Jan 18^th, 2014 at 4:07pm	Print Post
	Good Day-Have a new CPA 32/40. Am just getting started with breech seating. Have WW brass that I fireformed twice with 4227 with gas checked bullets seated deeply in cases. When I measure length of untrimmed cases they are 2.110 to 2.114 after firing. I had asked Gail the trim length and was told 2.168. Lyman book states 2.130. Do I trim to one uniform length? Have done extensive reading on the forum and have not seen case length/breech seating discussed. Thank You bwgdog


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JLouis Frequent Elocutionist Offline Posts: 10625 Joined: Apr 8^th, 2009	Re: 32/40 brass question Reply #1 - Jan 18^th, 2014 at 4:27pm	Print Post
	It would depend on the chamber reamer design and or how the chamber was cut. I would use what Gail provided you of which should be based on how they cut your chamber and the intended purpose breach seating and or fixed. JLouis

	" It Is Better To Now Have Been A Has Been Than A Never Was Or A Wanna Be "
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bwgdog Ex Member	Re: 32/40 brass question Reply #2 - Jan 18^th, 2014 at 5:04pm	Print Post
	Chamber was cut for breech seating. Have a Hoch 322 200 mold to use. The main doubt I have is if using shorter brass than the 2.168 breech seating would be detrimental in any way ? Thank You


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RSW Frequent Elocutionist Offline Posts: 1189 Location: Arizona Joined: Sep 8^th, 2006	Re: 32/40 brass question Reply #3 - Jan 18^th, 2014 at 5:20pm	Print Post
	bwgdog Uniform brass length is always a good thing but cartridge case length has little to do with it since you are breech seating. Regardless of case length, proper seating depth will be ahead of the case mouth. There are several threads on this forum on determining proper seating depth but if you can't find what you need, feel free to PM me or add your question(s) to this post.

	Randy W ASSRA 10211 - ISSA 125 There are indeed two Americas. Simply put, it is not the haves and have nots. The two Americans are in reality divided into those who do and those who don't.
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ledball Frequent Elocutionist Offline Posts: 1011 Location: syracuse, ohio Joined: Nov 20^th, 2009	Re: 32/40 brass question Reply #4 - Jan 18^th, 2014 at 6:14pm	Print Post
	The 2.168 figure must be a typo- the books say 2.130 as the length. Fireform your brass, maybe a couple of times, then find the shortest piece and trim the remaining brass to that length. After fire forming your brass will shorten to about 2.10----2.18. The length of your brass does not matter when breech seating. Ledball


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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 11472 Location: Why, out West of course Joined: May 29^th, 2006	Re: 32/40 brass question Reply #5 - Jan 18^th, 2014 at 8:18pm	Print Post
	Gas check bullets, deeply in the case? No need to do that. Fire form your cases as you need them by breech seating. Bell the mouth of a new case, BS a bullet and pow. Joe.

	A blind squirrel runs into a tree every once in a while.
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Green_Frog Frequent Elocutionist Offline "It ain't easy being green" ASSRA Life #281 Posts: 4032 Location: Lynchburg, VA Joined: Apr 18^th, 2004	Re: 32/40 brass question Reply #6 - Jan 18^th, 2014 at 9:30pm	Print Post
	The actual (breech) seating depth is the important dimension here. As long as that is consistent, the actual case length becomes much less significant. BTW, if you utilize the old method of using a single case over and over, the length will be consistent! Froggie


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bwgdog Ex Member	Re: 32/40 brass question Reply #7 - Jan 18^th, 2014 at 10:18pm	Print Post
	You all have been very helpful-Thank You. Have made up some 25-1 and will be breaking in the mold shortly. There is a wealth of knowledge here-Thank You for sharing!


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bohemianway Oldtimer Offline Posts: 646 Location: Andover, MN Joined: Apr 16^th, 2004	Re: 32/40 brass question Reply #8 - Jan 19^th, 2014 at 7:27pm	Print Post
	When 32-40 was scarce lots of people used 30-30 cases when BSing. Works fine and they are only 2.040 on a good day.


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John Boy Ex Member	Re: 32/40 brass question Reply #9 - Jan 19^th, 2014 at 11:32pm	Print Post
	Quote: The 2.168 figure must be a typo- the books say 2.130 as the length Ditto and use 6.5x53R Mannlicher cases to get full length. DO NOT trim them to 2.130 before they are annealed, fire formed and shot a couple of times. Otherwise you'll have short brass


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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 11472 Location: Why, out West of course Joined: May 29^th, 2006	Re: 32/40 brass question Reply #10 - Jan 20^th, 2014 at 8:36am	Print Post
	Quote: Quote: The 2.168 figure must be a typo- the books say 2.130 as the length Ditto and use 6.5x53R Mannlicher cases to get full length. DO NOT trim them to 2.130 before they are annealed, fire formed and shot a couple of times. Otherwise you'll have short brass 6.5X53R ? Joe.

	A blind squirrel runs into a tree every once in a while.
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John Boy Ex Member	Re: 32/40 brass question Reply #11 - Jan 20^th, 2014 at 9:38am	Print Post
	Quote: 6.5X53R ? Yes, per the Cartridge Conversions Manual table as the parent case


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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 11472 Location: Why, out West of course Joined: May 29^th, 2006	Re: 32/40 brass question Reply #12 - Jan 20^th, 2014 at 9:59am	Print Post
	Head size of the 6.5X53R is the same as the 303 British. Correct? Joe.

	A blind squirrel runs into a tree every once in a while.
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gunlaker Frequent Elocutionist Offline Posts: 2281 Location: lower mainland, B.C. Joined: Dec 13^th, 2010	Re: 32/40 brass question Reply #13 - Jan 20^th, 2014 at 10:46am	Print Post
	Just use the brass that you've fireformed. The length you were quoted was almost certainly an error. I've cast the chamber in my CPA .32-40 barrel and the length is just right for factory WW .32-40 brass. There is absolutely no way I could chamber brass with the length you were quoted as it would jam into the rifling. Chris.


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RSW Frequent Elocutionist Offline Posts: 1189 Location: Arizona Joined: Sep 8^th, 2006	Re: 32/40 brass question Reply #14 - Jan 20^th, 2014 at 10:55am	Print Post
	Proper length 32-40's the easy way: -buy Starline 38-55 brass, full length version 2.125" -anneal brass -size full length in 32-40 die -trim to near final length but leave brass a trifle long -fire-form in your rifle (two times if you like) -trim brass to final length Using the above steps, I just made up a batch for myself. When full length sized, brass grew to 2.185 length (give or take a coupl'a thou).

	Randy W ASSRA 10211 - ISSA 125 There are indeed two Americas. Simply put, it is not the haves and have nots. The two Americans are in reality divided into those who do and those who don't.
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