Trail Boss is a bulky powder mainly designed for low velocity/pressure pistol and rifle lead bullet cowboy action shooting. However it will work in reduced velocity jackated bullet rifle loads as well,runs about $16 average for a 9 oz. container. I've never used the powder as there are better option out there for us bullet caster and shooters for reduced velocity loads. The Lyman Cast Bullet Manuals #3 and the newer #4 will have lots of options using fast to med fast burning pistol and shotgun powders. Two of my favorites are the Lee 32 cal. 90 gr. SWC size down to .311" in any of my 30 cal. US rifles and .314' in my Russian rifles,it basically turns any of my 7.62 rifles in a nice plinker or small game getter. In the 7.62 x 39 I use 3.0 grs. of Alliant Bullseye in all other larger cases from 30-30,300 Sav.,7.62 x 54r and 308 or .06 I use 3.0 to 3.5 grs of Bullseye,no filler is needed with these loads. These are not MAX loads but the little slugs are and can be cast from pure lead and leading may become an issue if you push them much faster and accuracy degrades. MV usually runs around 900 to 1K fps. depending on the charge weight used and groups in general run 2" or less at 50 yds. My other plinker load I like to use in my 30-30 is the Lee 150 or 170 gr. gas check RNFP bullet cast for plain wheel weights for plinker loads I just give the bullet once coat of thinned down Lee Alox before and after sizing and leave the gas check off. For this load I use 7.0 grs. of Alliant Red Dot which gives me a MV or around 1200 fps. Other powders will work as well with the same 170 gr. bullet. There are lots of option as to powder and bullet weights and styles but you will have to get a copy of the Lyman Cast Bullet manual to get that data. 170 gr. cast bullets Red Dot 6.5 grs. 1159 fps. 8.5 grs. 1348 fps. Unique 7.0 grs. 1240 fps. 10.6 grs. 1555 fps. SR-4756 7.0 grs. 1102 fps. 10.5 grs. 1423 fps. W231 6.0 grs. 1175 fps. 8.0 grs. 1275 fps. TiteGroup 4.5 grs. 960 fps. 6.5 grs. 1383 fps. 2400 7.0 grs. 1005 fps. 11.0 grs. 1377 fps. Bullseye 5.0 grs. 990 fps. 7.4 grs. 1263 fps. RX7 20.0 grs. 1632 fps. 28.6 grs. 2165 fps. Trail Boss with Lead bullets. http://www.imrpowder.com/trailboss.html Trail Boss with jackated bullets. http://www.hodgdon.com/PDF/Trail%20Boss%20Reduced%20Loads%20R&P.pdf Ed Harris The Load http://members.shaw.ca/cronhelm/TheLoad.html Ed Harris Cast Bullet in Military Rifles, http://castboolits.gunloads.com/showthread.php?13425-Cast-Bullet-Loads-for-Military-Rifles-Article