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Trapdoor Springfield Barrel Line (Read 503 times)

FourBird Participating Member Offline Posts: 45 Location: Olympia, WA Joined: Oct 13^th, 2011	Trapdoor Springfield Barrel Line Jun 1^st, 2023 at 12:25pm	Print Post
	Toying with building a Trapdoor sporting rifle. I'm not a fan of the 45-70, so I'm thinking about lining the barrel in 40-65. My question is, does anyone have experience in doing so, and what were the results? Thanks in advance.

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John Taylor Frequent Elocutionist Offline Posts: 1684 Location: Lewiston, ID Joined: Oct 23^rd, 2006	Re: Trapdoor Springfield Barrel Line Reply #1 - Jun 2^nd, 2023 at 1:00am	Print Post
	Should work just fine. The liner has the same OD as the 45-70 at 5/8"

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Hebes405 Participating Member Offline Posts: 28 Location: Ohio Joined: Apr 18^th, 2023	Re: Trapdoor Springfield Barrel Line Reply #2 - Jun 2^nd, 2023 at 6:38am	Print Post
	Bob Hoyt in PA specializes in this type of work. He sleeved a trapdoor chamber for me, does good work


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1isenough Full Member Offline Posts: 202 Location: Louisville, KY Joined: Dec 28^th, 2017	Re: Trapdoor Springfield Barrel Line Reply #3 - Jun 2^nd, 2023 at 11:04pm	Print Post
	Did the same thing with a #1 rolling block because 40-65 loads are generally under 25K pressure and that suits the #1 roller. If your trapdoor is a 1873 model, that may be at the upper end of pressure since 20K is often cited as the max for the '73. Later models are said to handle 25-28K, so the 40-65 should be OK. It shoots well, and is a bit easier on the shoulder.


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