It's been forever, but I finally finished a test batch for the Dutch Beaumont. Pic attached.
For reference, here are the specs:
New Bertram brass, which out of the box was slightly too short (about 2.03 rather than 2.04 as called for in the spec). The necks were undersized too; I opened them up a little with the CH4D expander die then used a LEE universal die to flare the case mouths just enough to accept the projectiles.
Projectile: 385gr WW-lead mix BHN of about 8, cast with Lyman 457124 mould
Boolits sized to .457 using LEE sizing die
Primed with Winchester large rifle primers
25.0 grains Accurate 5744, boolits seated with CH4D seating die. VERY light crimp added as a final step, though for future loadings I'll probably skip this step as I suspect it's not needed.
C.O.A.L. ended up at 2.5" average though I was trying for 2.54". Probably close enough.
We'll see how they do... I have a couple of other boolit sizes to try once I verify that this recipe is ok.
(.223 included for size reference)
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