A 200 grain RNFP 45 over 6.7 grains WW231, WLP primer and any brass is an accurate "Medium Load" (about 45ACP energy). In my 4" & 5.5" Vaqueros are accurate and manageable! (should be great in your Long Tom!)

Trail Boss turns out some fantastic accuracy when the powder column stops 1/16" below the bullet base! My 38-55 had a 100 yard 20 shot group that could be covered with a nickel using Lyman tang and 17M globe sights.

For over powder cards, I use .030 cork I bought from Midway. 44 & 45 use the same size. For 38-55 & 375 I turned a quart orange juice carton into about 2000 at one sitting with a 3/8" arch punch for leather work!

Never underestimate the amount of consistency an over the powder wad or card add to an otherwise ho-hum load!

Ivan