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Hot Topic (More than 10 Replies) 40-65 issues (Read 1223 times)
JHand
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40-65 issues
Mar 19th, 2025 at 9:47pm
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Dad just got his rebarreled 40-65 Shiloh out to the range today and loved it, I guess it was shooting 5 shots under 1" at 200 yards! But... After each shot he had to use a ramrod to knock the case out. He made all his brass from Winchester 45-70. He formed and trimmed to 2.1", but the Shiloh would not extract the case. 

I am talking through it over the phone, I should be seeing him this weekend. Any ideas what could cause this? My 2 guesses are that the case is too long for the chamber and may be getting caught in the filing after firing, or the chamber may have a bulge somewhere?
  
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bpjack
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Re: 40-65 issues
Reply #1 - Mar 19th, 2025 at 11:01pm
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What load is he using?
  
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sureshot
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Re: 40-65 issues
Reply #2 - Mar 19th, 2025 at 11:02pm
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Shiloh 40-65 chambers are notorious for being tight. Is there any trouble chambering the loaded rounds before firing?

Steve 😀
  
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gunlaker
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Re: 40-65 issues
Reply #3 - Mar 19th, 2025 at 11:13pm
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Shiloh 40-65 chambers are quite tight right above the rim.  I'd put some black felt around the web and see if there is any hard contact when chambering and extracting a round.

I have a couple of Shiloh's in 40-65 and use RCBS dies made specifically for the Shiloh.  They reduce the case about 0.001" smaller right at the tight spot and made a big difference in my rifles.   The RCBS part number is 56483

Chris.
  
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830singleshot
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Re: 40-65 issues
Reply #4 - Mar 19th, 2025 at 11:13pm
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I had a similar problem years ago.
My sizing die wasn't forming the base down far enough.  It would chamber with a small amount of breech block camming but not extract.
I sat the case on top of a 22 hornet case holder so I could push the case in till the rim touched the die.  I pushed the case out with an arbor press and punch.

It was slow and labor intensive but it worked.
  
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marlinguy
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Re: 40-65 issues
Reply #5 - Mar 20th, 2025 at 12:03pm
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If it's having extraction issues I'm guessing it's not chambering easily either?
Tell him to use a big black felt marker and color the whole case with black. Then chamber it, and remove it to let him see where any black is missing. That will tell him where the issue is.
  
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art_ruggiero
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Re: 40-65 issues
Reply #6 - Mar 20th, 2025 at 4:31pm
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i had to shorten my sizer dye a small amount to solve that problem in a shiloh 40/65 chamber  art
  
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JHand
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Re: 40-65 issues
Reply #7 - Mar 20th, 2025 at 5:04pm
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marlinguy wrote on Mar 20th, 2025 at 12:03pm:
If it's having extraction issues I'm guessing it's not chambering easily either?
Tell him to use a big black felt marker and color the whole case with black. Then chamber it, and remove it to let him see where any black is missing. That will tell him where the issue is.



He is resizing with a 40-65 Shiloh die which allows it to chamber with no issues. With a resized case, he can point the rifle up, and the case falls out. Seems to only be an issue after firing. He is going to use the sharpie, as well as run a bore camera down it with the brass in the chamber to see where it sits
  
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gunlaker
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Re: 40-65 issues
Reply #8 - Mar 20th, 2025 at 5:18pm
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Interesting.  I once had a C. Sharps highwall that had trouble extracting fired cases.  It was caused by the chamber being sloppy above the web, and the extractor cut a little small.  When the case was fired it expanded a little larger than the extractor so wouldn't come out.  I had to take a little bit of material off of the extractor to get it to function properly.

Chris.
  
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marlinguy
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Re: 40-65 issues
Reply #9 - Mar 21st, 2025 at 10:38am
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It may drop in and out freely, but is he closing the action first before seeing if it drops out? It might be right at the slightly over length where firing causes the case to contact the end of the chamber.
Might consider shortening one case slightly, and after loading it up return to the range to see if the problem is gone.
  
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1Hawkeye
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Re: 40-65 issues
Reply #10 - Mar 21st, 2025 at 7:09pm
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. 40-65 cases should be 2.10" in length just like a .45-70.  Are any other cases being used and are they giving the same results?
  
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oneatatime
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Re: 40-65 issues
Reply #11 - Mar 21st, 2025 at 7:41pm
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He never replied what the load was. Maybe it was one of those 40% of black loads like 26 grains of Bullseye;-) Or was it supposed to be 4198? Oh well, smokeless is smokeless. DO NOT EVER use Bullseye like that!!!! Wasn't it one of the old Lyman manuals that had a misprint load that could blow up a gun? The original post that asked the question about the load was a valid one and deserved an answer.
« Last Edit: Mar 22nd, 2025 at 1:47pm by oneatatime »  
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Schuetzendave
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Re: 40-65 issues
Reply #12 - Mar 21st, 2025 at 8:37pm
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The Shiloh Sharps .40-65 has a tight Match chamber and you need the RCBS Shiloh Sharps dies to squeeze them down enough.
  
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JHand
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Re: 40-65 issues
Reply #13 - Mar 22nd, 2025 at 12:10am
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oneatatime wrote on Mar 21st, 2025 at 7:41pm:
He never replied what the load was. Maybe it was one of those 40% of black loads like 26 grains of Bullseye;-) Or was it supposed to be 4198? Oh well, smokeless is smokeless.


I believe 55gr of Swiss 1.5 with a saeco 740
  
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1Hawkeye
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Re: 40-65 issues
Reply #14 - Mar 22nd, 2025 at 12:37am
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I'm thinking its the winchester brass causing the problem. He's using the right dies and the brass is the right length. Iv'e had problems with winchester 45-70 cases that I made 40-65's out of in my shiloh. It seemed the case web wasn't sizing down properly and it caused loading and extraction problems. I neck size my cases after the first firing. With hornady brass I can get away with about 5 shots on a case before it needs full lenght sizing again. Starline 40-65 cases don't cause any problems.
  
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