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Results 1 to 9 of 9

Thread: RIMMED Vs RIMLESS CASE IN BREAK OPEN ACTIONS

  1. #1
    Boolit Man GEOMETRIC's Avatar
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    RIMMED Vs RIMLESS CASE IN BREAK OPEN ACTIONS

    QUESTION:
    Double rifles are traditionally chambered for rimmed cartridges. I am looking at the various options for the EAA MP 94 combination rifle/ shotgun. There are a number of options for the rifle barrel. It can be had in .30-06 or 7.62x54R which have similar ballistics.
    The 30-06 brass sells for about half the cost, is there any significant advantage to using a rimmed case in a break open gun as apposed to a case like the 30-06?

  2. #2
    Boolit Master
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    Generally speaking , it makes for a simpler ejector, therefore more likely to be reliable. Singles dont " use up your brass" like hull checkers. Either by loss or damage, so 50 rounds of 7.62x54 could easily be a lifetime supply!
    “You don’t practice until you get it right. You practice until you can’t get it wrong.” Jason Elam, All-Pro kicker, Denver Broncos

  3. #3
    Boolit Master

    Wayne Smith's Avatar
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    Many people will say no, but I have an Encore Katadin in 45-70 and 500S&W. The 500 sometimes slides over the extractor and won't extract. This never happens with the 45-70. That's why, when thinking of a .25 single shot I opted for the Krag rather than the -06 case.
    Wayne the Shrink

    There is no 'right' that requires me to work for you or you to work for me!

  4. #4
    Boolit Master Jedman's Avatar
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    I have a MP 94 in 12 ga. / 30-06 and the extractor has a small spring loaded protrusion that snaps in to the rimless groove, so far it hasn't missed a lick but doesn't look very rugged.
    I wish it had a 7x57 R or 8 X 57 R instead but got it cheap when Buds was down to a handful left and had a make offer asking price.

    Jedman

  5. #5
    Moderator Emeritus


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    I have encores/contenders in rimmed and rimless cases and notice little difference.
    [The Montana Gianni] Front sight and squeeze

  6. #6
    Boolit Man GEOMETRIC's Avatar
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    Thanks guys, I guess I will go with a rimmed cartridge in the vane of "keep it simple stupid". I like the 9.3x74 but would probably be better of with a .308 or .310 cal.

  7. #7
    Banned
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    I have a dozen Ruger No. 1s. 2 belted, 2 rimmed, 8 rimless. Never a failure in 1000s of rounds.

    9.3x74 is a great round with cast. Ballistics press hard on 375 H&H, also a great cast boolit round.

    IME the smaller a boolit diameter, the harder to make good boolits and the harder to get them to shoot well.

  8. #8
    Boolit Master



    curator's Avatar
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    Quote Originally Posted by GEOMETRIC View Post
    Thanks guys, I guess I will go with a rimmed cartridge in the vane of "keep it simple stupid". I like the 9.3x74 but would probably be better of with a .308 or .310 cal.
    Geometric.

    If .308 is interesting to you look closely at the .307 winchester case. Basically, a .308 Win with a rim. I use this cartrrige in my Lee Enfield DCRA conversions to 7.62. The .307 brass works great and extracts beautifully.

  9. #9
    Moderator Emeritus


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    The trouble with 307 & 356 is a regular source of brass. Graf and Sons used to do an annual run but haven't since 2012 or so.
    [The Montana Gianni] Front sight and squeeze

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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