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Thread: Maximum length cartridge.

  1. #1
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    Maximum length cartridge.

    Does anybody know the maximum length cartridge that a rolling block will allow to be chambered.

  2. #2
    Boolit Master
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    It is limited by barrel length, any cartridge longer than the barrel will perform poorly

  3. #3
    Boolit Master

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    Quote Originally Posted by onelight View Post
    It is limited by barrel length, any cartridge longer than the barrel will perform poorly
    You are correct.
    On a single shot firearm it can be anything you want it to be.
    Political correctness is a national suicide pact.

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    only to God and my own conscience.

  4. #4
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    Quote Originally Posted by Hickory View Post
    You are correct.
    On a single shot firearm it can be anything you want it to be.
    Really. That's good to hear. I guess I don't need to worry that a Remington roller will easily chamber a 45-120 3-1/4" cartridge. I was a bit conserned that the block might prevent a cartridge of that length from chambering. Hence my question. I know of no problems with shorter length cartridges, but serious concerns on the 45-120 gave me pause.

  5. #5
    Boolit Master

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    Quote Originally Posted by Hickory View Post
    On a single shot firearm it can be anything you want it to be.
    Cartridge Maximum length is only important when fitting them in a magazine.
    With a single shot your maximum length will be where you get the best accuracy.
    Political correctness is a national suicide pact.

    I am a sovereign individual, accountable
    only to God and my own conscience.

  6. #6
    Boolit Master
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    Quote Originally Posted by Hickory View Post
    You are correct. On a single shot firearm it can be anything you want it to be.
    That is not true. Some single shot rifles do have a maximum length. The Martini is an example. There are others.

  7. #7
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    Well let me ask this another way that may be clearer. As I'm sure everyone knows there is a distinct advantage to a falling block action when it comes to inserting a long cartridge over inserting the same cartridge into a rolling block action due to the block mechanism getting in the way of inserting a overly long cartridge. So, does anyone have an educated guess what the maximum length cartridge would be before the block interfered with loading the cartridge into the chamber on a Remington / Husqvarna roller.

  8. #8
    Boolit Buddy
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    With a rolling block you do have some limitations, the hammer nose is the interfering point. The length,diameter and taper of the cartridge have a bearing what will fit. A .50 x 3-1/4 probably isn't going to go without modifying the hammer nose. If you look at the hammer of a RB chambered for a shotgun shell you see what needs to be done.

  9. #9
    Boolit Grand Master

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    Actually George Nonte did this in the 70's and found out that a 3" 45 case was too long to pas the hammer nose and IIRR he ground the hammer down to get the ctg in.

  10. #10
    Boolit Master marlinman93's Avatar
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    The maximum length has more than just length to consider. Rim and base diameter come into play also. A smaller rim and base diameter will clear the breech block easier, and allow longer length.
    But the block contour also affects what length and base diameter the Rolling Block will accept. So if your donor rifle has one of the concave breech blocks machined to clearance larger rim and base diameters, then it will accept longer, and larger cases.
    Which breech block does yours have? The flat block, or the concave?

  11. #11
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    Mmm, here's some images






  12. #12
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    I want to take one of these RB and I'm looking at maybe a 40-82, or something in that realm. Only using BP and cast.

  13. #13
    Boolit Bub
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    I've had no problems with my Green Mountain barrel and chambered in 40-82WCF on a #5 smokeless receiver.
    WW

  14. #14
    Boolit Buddy
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    I think you will be fine with a 40/82 and the rifle you showed in the photo. The hammer appears lower than what I am used to on sporters. The tapered case will very much work in your favor. I'll try to attach a couple photos of a 40/70 2-1/4 (COAL=2.8) for reference. Your case and bullet will be longer but you will see the idea.Click image for larger version. 

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    There is a lot of clearance in this case.

  15. #15
    Boolit Bub
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    40-90-2 5/8 bottle neck will also clear the hammer and block.
    WW

  16. #16
    Boolit Master
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    A roller will not chamber the 45-120 without modification to the hammer nose AND taking some brass off one side of the rim. At least the Pedersoli I had the chamber cut for the 120 wouldn't. I had the barrel set back and re-chambered to 45-70, then sold it.
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  17. #17
    Boolit Grand Master



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    As stated by some the RB does have AOL issues with longer cartridges. This is strictly from memory and I am not a RB guy but I believe 45-90 is about the limits without having to modify the hammer nose.

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  18. #18
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    Well you guys have come through for me once again. I have not yet found out which # action within the Remington group that the Swedish government decided to license from Remington to manufacture their military arms. I need to drop dutchman a pm maybe there is a way to find out which model Remington action they used.

    I thought I read somewhere that the 44-77 was the longest that would fit. So I figured this would be the right place to ask.
    Last edited by MOA; 07-09-2020 at 05:24 PM.

  19. #19
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    Quote Originally Posted by kootne View Post
    I think you will be fine with a 40/82 and the rifle you showed in the photo. The hammer appears lower than what I am used to on sporters. The tapered case will very much work in your favor. I'll try to attach a couple photos of a 40/70 2-1/4 (COAL=2.8) for reference. Your case and bullet will be longer but you will see the idea.Click image for larger version. 

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    There is a lot of clearance in this case.
    Nice looking roller kootne. Thanks for the visual aids. I love visual aids the best.

  20. #20
    Boolit Grand Master



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    Quote Originally Posted by MOA View Post
    Well you guys have come through for me once again. I have not yet found out which # action within the Remington group that the Swedish government decided to license from Remington to manufacture their military arms. .
    http://www.gotavapen.se/gota/artikla.../remington.htm

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    2nd Amendment of the U.S. Constitution. - "A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."

    "Before you argue with someone, ask yourself, is that person even mentally mature enough to grasp the concept of different perspectives? Because if not, there’s absolutely no point."
    – Amber Veal

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check