![]() ![]() ![]() Most of the what's in this book was discovered or invented by cast bullet shooters over the past several hundred years. The print version, of course, doesn't include these workbooks. 0.0 THE BEGINNING INTRODUCTION This book comes on a CD that includes a set of Excel workbooks. I can't understand why anyone would even consider TB in a large rifle case.CAST BULLETS FOR BEGINNER AND EXPERT SECOND EDITION, 2007 Joseph F. That Trail Boss load to 3031, the same 405 grain cast bullet that Trail Boss pushes to only 1007 FPS at 25,600 CUP will run 1706 FPS at only 21,100 CUP with 3031! The MINIMUM 3031 load using that bullet is going 1597 FPS at only 17,300 CUP! That's 590 FPS more velocity at 8,300 CUP LESS pressure than the same bullet with Trail Boss! Trail Boss was producing 773 FPS LESS velocity at 4,700 CUP more pressure than Varget and 638 FPS less velocity at 6,700 CUP MORE pressure than H4895! Trail Boss can produce high pressures in these large cases while at the same time producing only very anemic velocities, here are some examples of such taken from Hodgdons own data,Ĥ05 cast bullet they list the max for Trail Boss at a trapdoor load at 13 grains for only 1007 FPS at 25,600 CUP!Ĭompare that to Varget trap door loads at 1781 at 20,900 CUP or H4895 at 1645 at only 18,900 CUP! Check out Hodgdon's data site for Trap Door loads, they have several bullet/powder choices (including TB) for the Trap Door and they show the pressures for these loads. There is a very common and very mistaken idea that because Trail Boss yields such low velocities it must be a low pressure load, NOT TRUE! Trail Boss can be used for Springfield level loads but there are much better choices that will yield a LOT better velocity at much lower pressures. As far as I know it is in sound shootable condition, so is their any reason a 405 Grain lee hb and a load of trail boss or other lower pressure load should not be fired in the gun? My brother in-law has a old Springfield trapdoor 45-70 and is hesitant to shoot anything but black powder in it. ![]()
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