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Thread: Results from a new caster

  1. #1
    Boolit Master
    Join Date
    Sep 2010
    Posts
    190

    Results from a new caster

    On Saturday I had my first real solo casting session (I got sidetracked the last few months when we moved from AZ to NM). I was testing out my new Mihec H&G68 clone. I had fun and got some beautiful boolits, but my yield was quite low. I suspect this was because it was hard to keep the temperature in my 10 lb Lee pot very constant, and also because I may not have let the mold get hot enough when I started. It seemed like the end of the session after the mold was good and hot I got better consistency. I was using clip on WWs/linotype in a ratio that gave me about 2% tin.

    I have tumble lubed about 120 of these with LLA, and I'm planning to load up a couple this weekend and see if they chamber in my gun. If they do, I won't size them (they seem to be pretty consistent .453 falling from that mold).

    The two most common problems I saw were that the front driving band (I'm not sure that's what it's really called) was a little bit rounded, not perfectly sharp; and second, that the base of the boolit was often not flat, but had a small crater in it.

    I have heard the base of the boolit is the most important part for accuracy, so how concerned should I be about the imperfect base and the rounded front driving band? The circumference of the bases of the booilts are very nice and square. I assume that's really the important part? These will be used for plinking, so I don't need MOA accuracy from my 1911 Commander, but I'd like them to have reasonable accuracy.

  2. #2
    Boolit Master
    Join Date
    Apr 2011
    Posts
    189
    The reason for the crater is not enough alloy is left for the sprue. As it cools the metal shrinks a little and needs metal on the sprue to fill in. The 'front driving band' problem could be from a number of things.

    Sam

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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