The semi-wadcutters don't feed reliably in my Marlin lever actions and before ordering a mold I would sure try some to confirm that they actually feed in yours first!
My "go-to" bullet in all of my .44 rifles and revolvers is Accurate 43-230G. This is a double-crimp-groove design which enables you to seat bullets out long in the rear crimp groove to increase powder capacity in the .44 Special and to improve feeding of rounds assembled in the short cases for rifles, or to exploit the longer cylinder length of Ruger revolvers in .44 Magnum. You can alternately crimp in the front crimp groove in .44-40 or .44 magnum brass to maintain factory 1.61" OAL which is needed for reliable feeding in your Marlin.
I don't use a gascheck because I don't feel that one is needed. A caseful of H- or IMR4198 or RL7, compressing the powder about 1/8" as the bullet is seated, in the same manner as if loading black powder, is a powerful and accurate load. You can order Accurate molds to drop the diameter you want, using the alloy you intend to use.
If you really wanted a GC bullet Tom could cut this design for you adding a 0.090" long GC heel below the bevel base and the bullet would then weigh about 265 grains. I don't powder coat, but if you wanted a bullet with the crimp grooves only and no lube groove, or just a few tiny grooves, he can do that too.
Best of all, when ordering an Accurate mold you get a custom mold cut to fit YOUR specs, to fit YOUR gun, using YOUR alloy, and delivery time is only about 3 weeks. This is MUCH better than waiting around for a "group buy" to come together which is then a compromise based on somebody else's ideas, which may not even fit your gun.
I own over a dozen Accurate molds and am done forever with "group buys..."
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