ASSRA Forum - Breech seating 101

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Breech seating 101 (Read 438 times)

jhm Frequent Elocutionist Online Posts: 2119 Location: georgia Joined: Sep 4^th, 2011	Breech seating 101 Sep 11^th, 2026 at 11:44pm	Print Post
	I have never breech seated but have read much about it. I would really like to breech seat load my 32-40 Hepburn. It is of course a 30 cal but can the same principles be used for a 30 cal and what dictates how far to seat the bullet? JMH


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RSW Frequent Elocutionist Offline Posts: 1317 Location: Arizona Joined: Sep 8^th, 2006	Re: Breech seating 101 Reply #1 - Sep 12^th, 2026 at 12:42am	Print Post
	Use a bullet about .001" over groove diameter. Seat it ahead of the chamber just far enough so it completely seals the bore (that's usually about 1/16" ahead of the chamber but that's not a hard-n-fast distance in front of the chamber mouth). By shooting your rifle you, can seat the bullets a little farther forward or back depending on what yields the best accuracy.

	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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jhm Frequent Elocutionist Online Posts: 2119 Location: georgia Joined: Sep 4^th, 2011	Re: Breech seating 101 Reply #2 - Sep 12^th, 2026 at 9:35pm	Print Post
	Do you have a picture of a Hepburn seating tool or know where one can be purchased? JMH


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RSW Frequent Elocutionist Offline Posts: 1317 Location: Arizona Joined: Sep 8^th, 2006	Re: Breech seating 101 Reply #3 - yesterday at 12:34am	Print Post
	jhm Unfortunately I've never seen a breech seater for a Hepburn. The only sources for breech seaters I'm aware of are Riverview Rifle works Bill Bargloff. I don't know if either of them would make one for a Hepburn.

	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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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12535 Location: Why, out West of course Joined: May 29^th, 2006	Re: Breech seating 101 Reply #4 - yesterday at 2:37am	Print Post
	My Hepburn 38-55 has been shot many times breech seated but I never had a Hepburn breech seater. I didn't know they existed. My own breech seater will work in a Hepburn but I never needed extreme force to seat an oversize or hard bullet. One time something happened where I didn't have a breech seater so I used a piece of wood dowel with a mark on it to seat bullets. Not the most convenient but it worked fine. Not rocket science.
	« Last Edit: yesterday* at 2:43am by westerner* »
	A blind squirrel runs into a tree every once in a while.
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jhm Frequent Elocutionist Online Posts: 2119 Location: georgia Joined: Sep 4^th, 2011	Re: Breech seating 101 Reply #5 - yesterday at 6:01am	Print Post
	I am sure I can fab something up I was just looking for a picture of one. I have seen the pusher type before but was thinking maybe I needed a mechanical one. Thanks for the pictures. JMH


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Oakdale Full Member Offline Posts: 127 Location: Maplewood, MN Joined: Jun 7^th, 2017	Re: Breech seating 101 Reply #6 - yesterday at 9:23am	Print Post
	For the 2025 match season I used a plugged case, a nylon rod and plastic headed hammer to seat the tapered bullet. An annoying sequence, especially when the match clock is running. In the fall I ordered a breach seater from Riverview Rifles. I used that this entire match season. Robb produced a well made, useful and impressive looking tool. It worked great! Now for me to learn how to shoot this CPA .38-55….better! Tom


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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12535 Location: Why, out West of course Joined: May 29^th, 2006	Re: Breech seating 101 Reply #7 - yesterday at 11:07am	Print Post
	This thread reminded me that I need a scope friendly breech seater for the Binger HW. Found the parts, now I need to make a .336 drive rod and case to fit the seater. I used to make and sell this breech seater for eighty dollars back in the late eighties. So far it has been used in Rugers, Borchardts and hiwalls. Not hard to make but time consuming. I'm sure it will work in a Hepburn.

	A blind squirrel runs into a tree every once in a while.
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Chuckster Frequent Elocutionist Online Posts: 2325 Location: Colorado Joined: May 15^th, 2008	Re: Breech seating 101 Reply #8 - yesterday at 11:42am	Print Post
	Hepburn works fine with any breech seater that locks into the receiver shoulders. Only issue: Have to cock the hammer before inserting the breech seater. Chuck


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Bulseyetom Frequent Elocutionist Offline Posts: 1040 Location: Santa Maria, Ca Joined: Oct 31^st, 2010	Re: Breech seating 101 Reply #9 - yesterday at 11:59am	Print Post
	I use a breech seater for a High Wall with my Hepburn and it works great. Tom


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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12535 Location: Why, out West of course Joined: May 29^th, 2006	Re: Breech seating 101 Reply #10 - yesterday at 12:01pm	Print Post
	Hepburn hammer cocked it fits perfect.

	A blind squirrel runs into a tree every once in a while.
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bpjack Frequent Elocutionist Offline Posts: 3975 Location: East Olympia, WA Joined: May 18^th, 2008	Re: Breech seating 101 Reply #11 - yesterday at 12:57pm	Print Post
	I have a lever type seater that might possibly work for a Hepburn. It hooks on to a stud somewhere forward of the chamber. If one of the action screws were replaced with one that extended about 1/4” out with a head on it that the seaters ‘hook’end would engage. Not sure if the screw locations shown would allow the proper leverage though.

	People who think they know everything are a great annoyance to those of us who do.
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Oakdale Full Member Offline Posts: 127 Location: Maplewood, MN Joined: Jun 7^th, 2017	Re: Breech seating 101 Reply #12 - yesterday at 1:18pm	Print Post
	Have to cock the hammer first, before inserting the breach seater, in the CPA .38-55. Tom


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Bulseyetom Frequent Elocutionist Offline Posts: 1040 Location: Santa Maria, Ca Joined: Oct 31^st, 2010	Re: Breech seating 101 Reply #13 - yesterday at 1:35pm	Print Post
	I have an original Stevens 44 1/2 action in 25/35 that CPA rebuilt for me. I asked Paul at the time about a breech seater for it and he told me to use two plugged cases, one to get the bullet started and a second to seat it to depth. I use a tapered bullet when I load the gun that way. I figured if that method was good enough for Paul Shuttleworth it was good enough for me! Tom


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bpjack Frequent Elocutionist Offline Posts: 3975 Location: East Olympia, WA Joined: May 18^th, 2008	Re: Breech seating 101 Reply #14 - yesterday at 2:22pm	Print Post
	Here is the side hook seater. Marling guy and I tried it in a rifle of his at the Oregon show to see where the receiver stud would need to be placed. We estimated that it needed yo be in the center to front center. Looks like it would best to have the hook inline with the chamber. I am actually surprised that CPA never contracted with a machine shop to make a seater for their rifles. I have lost count of how many shooters ask if my seaters would work with a CPA (they do not!). Russ Weber made quite a few in his day and they command a healthy price. Jack

	People who think they know everything are a great annoyance to those of us who do.
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