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32 Miller Short vs 32-20 CPA vs Other 32 Cal (Read 504 times)

joelpend Participating Member Offline Posts: 26 Location: Central North Carolina Joined: Dec 29^th, 2015	32 Miller Short vs 32-20 CPA vs Other 32 Cal Aug 13^th, 2025 at 5:15pm	Print Post
	I have become increasingly interested in rifle cast bullet accuracy and shooting (maybe goes with maturing age?). I have a CPA rifle in 38-55 that I use for informal "bench buffalo" matches. I also have a Ballard Schuetzen rifle in 8.15x46R with a CPA Douglas barrel. I have a itch for another 32 cal and have a new CPA rifle ordered and want to confirm my chamber choice. I thought I was settled on 32-20 CPA but I could be easily persuaded to go with something else. I think I would like the option of shooting fixed ammo or breech seating. You folks with a lot of years in this please give me some guidance.


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frnkeore Frequent Elocutionist Offline Posts: 7484 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: 32 Miller Short vs 32-20 CPA vs Other 32 Cal Reply #1 - Aug 13^th, 2025 at 5:27pm	Print Post
	32/20 cases, are on the weak side. Very weak if you use Winchester cases and the 32/20 doesn't have enough case capacity for fixed ammo, with heavy bullets. Minimum capacity for fixed, would be at least the 357 Max case. You could get about 16/1700 fps out of a 200 gr bullet. A better fixed chamber, would be a 32/40, with a straight neck, freebore and a slow lead. It will still shoot BSed, with the same accuracy and loads as the std 32/40. You can get at least 1900 fps with that case and a 200 gr bullet.

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joelpend Participating Member Offline Posts: 26 Location: Central North Carolina Joined: Dec 29^th, 2015	Re: 32 Miller Short vs 32-20 CPA vs Other 32 Cal Reply #2 - Aug 14^th, 2025 at 8:43pm	Print Post
	I decided on 32-40. It seems to be the most versatile with the long neck and generous case capacity. I plan to make cases using the long Starline 38-55 brass. I will anneal it from the start because it is normally pretty hard as delivered. Thanks to those that responded to my inquiry.


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Babydriver Full Member Offline Posts: 134 Joined: Mar 22^nd, 2024	Re: 32 Miller Short vs 32-20 CPA vs Other 32 Cal Reply #3 - Aug 14^th, 2025 at 9:25pm	Print Post
	Just curious since I have just fired 100 32-40 rounds, 50 black powder and 50 smokeless in the past 24 hours all 32-40 cases, why you want to form it from 38-55. Always willing to learn. 😂


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gnoahhh Oldtimer Offline Posts: 956 Location: Gaithersburg, MD Joined: Mar 31^st, 2010	Re: 32 Miller Short vs 32-20 CPA vs Other 32 Cal Reply #4 - Aug 14^th, 2025 at 9:55pm	Print Post
	Babydriver wrote on Aug 14^th, 2025 at 9:25pm: Just curious since I have just fired 100 32-40 rounds, 50 black powder and 50 smokeless in the past 24 hours all 32-40 cases, why you want to form it from 38-55. Always willing to learn. 😂 For those not fortunate enough to have a stash of .32-40 brass, making it out of .38-55 brass is an easy and economical alternative to searching and paying for .32-40 brass.


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Babydriver Full Member Offline Posts: 134 Joined: Mar 22^nd, 2024	Re: 32 Miller Short vs 32-20 CPA vs Other 32 Cal Reply #5 - Aug 15^th, 2025 at 12:11am	Print Post
	Just curious since I have just fired 100 32-40 rounds, 50 black powder and 50 smokeless in the past 24 hours all 32-40 cases, why you want to form it from 38-55. Always willing to learn. 😂


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joelpend Participating Member Offline Posts: 26 Location: Central North Carolina Joined: Dec 29^th, 2015	Re: 32 Miller Short vs 32-20 CPA vs Other 32 Cal Reply #6 - Aug 15^th, 2025 at 8:53pm	Print Post
	Who knows when 32-40 Brass will be made again by Winchester or whomever. Can't even find 38-55 except Starline. Hopefully it will not be too thin. I use it in 38-55 with no issues. I do anneal it every firing.


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