I'm wondering which version you have Brad, if you have to trim cases back for a Marlin? I evidently got the last of the older version from NOE in a RG4. Then ordered another mould in 5 cavity, both with same designation, but the 5 cavity was a wider nose. I PM'ed RD at the NOE site and he said the wider nose was for the Winchesters and my original purchased mould, was for the Marlins. I can crimp in the crimp groove of either and still chamber them in my Marlin but the earlier version way out shoots the wider nose, in my Marlin, and dimple points the best.
We had this conversation on here once before, and it sounds like there have been 5 or 6 versions of this mould made. The bullet Ben has pictured here appears to be the original nose shape, and should work in most Marlins????
Kevin,
Before you buy the mould, I have a 1/2 gallon of the wider nosed RD bullets cast, sized to .311, lubed and checked. If you want to try them out just let me know and I'll send you some.