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Originally Posted by BradLH
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I've been curious about the Mr. BulletFeeder expander / funnels for a while. W/ regards to suitability for different kinds of bullets, the big question for me is, what is the OD of the expander?
I contacted them by email once, inquiring about expander diameter, & they were a little vague. Indicated that the exact OD, kind of depended on the particular production run.
The OD of my Lyman M 38 / 357, is 0.355", & the .45 plug is 0.449. Figuring 0.001" springback (depending on the brass), I get case mouth ID's of 0.354", & 0.448" respectively.
I don't load swaged (& very rarely jacketed) in either caliber, but the "M" seems to work well w/ .358" (cast & plated), as well as .452" cast, & .451" plated.
I'm not sure how snug, is too snug - for swaged bullet match loads, but I'd think a custom machined 0.356" (or 0.357") OD expander, might be interesting to try out.
A "new style", Dillon .38 / .357 expander, has an OD of 0.354", producing an expanded case mouth ID of 0.353", which to me, has always seemed a bit snug - for hard cast .38 / .357 target loads. Other's mileage may vary, I suppose.
Can you provide an OD, of your Mr. BF, .45 cal expander?