The Lyman 48-50th Editions have lots of Trapdoor compatible data for the 45-??s in smokeless . For PP the general suggestion is is to use jacketed start data . Any cast data will do fine also . Use a taper crimp if you must crimp to avoid cutting the paper .
On castboolits under the BP paper patch section you will find a sticky dedicated to paper . I would suggest digesting in 3-4 settings or 3-4 readings . There are a couple good tutorial stickies under smokeless paper patch . Due to the nature of the 45-70/90/100/110/120 and Sharps etc variations you have to mind of merge the BP and smokeless information as the smokeless information is tooled toward 40+ kpsi and the BP is tooled more toward sub 25kpsi and the nature of BP propellants .
I like the old green bar chain paper for the old matrix printers .
New bright white wet ink paper should be avoided unless you're cleaning up a barrel , it's about the clay ......read the BP paper patch paper sticky .
Core sizing should start around .001-2 over BORE dia and so that the 2 wraps of paper end up .001 over groove dia with smokeless . With a .450×.458 barrel that means you paper thickness needs to be about .00175 . 2 laps is 4 thicknesses around the core and .00175×4 is .007 wrapped around a .451-2 core gives you a .458-9 bullet for the .457+ groove .
Now that you have a complete head full of cotton sensory overload I can tell you that it's not even all the basics .
The Paul Mathews book the paper jacket is available on several forums and FB pages as a free download . Castboolits has most of the information distilled down to user specific details if you don't feel the need to know and understand why the minutiae makes this and that do that and this .
Reply With Quote
Data changed in following Lyman editions.
