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Author Topic: Marlin 336 (30-30), Microgroove barrel, and cast bullets  (Read 22887 times)

xsquidgator

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Re: Marlin 336 (30-30), Microgroove barrel, and cast bullets
« Reply #25 on: December 31, 2011, 07:31:12 pm »
Graph your charge weights vs. velocities-

Notice how your velocity and charge weights don't increase in linear fashion?  Be careful.  If that 29 grain charge is accurate enough for you, and burning clean enough, I wouldn't push it much farther.

Right you are.  Actually, I'd say 27 grains of BL-C(2) is probably enough.  Gets up over 1800 fps, before anything possibly funny about additional powder not predictably raising the muzzle velocity happens.
Not that it's a guarantee or anything, but, brass from all loadings was fine without any pressure signs.  (I recall the Lyman manual shows brass exposed to 30% overpressures w/o pressure signs too, but still, it's a piece of information).
I'll probably go with about 27 grains of BL-C(2) for a 30-30 plinking load, I think.

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    only1asterisk

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    Re: Marlin 336 (30-30), Microgroove barrel, and cast bullets
    « Reply #26 on: January 06, 2012, 12:53:22 pm »
    You or your nuclear pharmacy ever needs to dispose of some of them lead casks, I'll send you and address and pay the freight.  I have a bunch of monotype that I can use to alloy it.

    You'd be much happier in the long run with other powders. 
    Reloader 7 is a good choice and makes great economical .223 plinking/3gun loads.
    IMR 4198 might be even better at both.
    Hodgdon 335/Winchester 748 make great full power 30-30 cast and are .223 standbys.
    4895 will do 97% of what 4064 does and is a much more flexible powder more suited for cast loads, not to mention no fillers are needed and it works better in powder measures.





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