Sorry AtlLaw...didn't mean to wake you....
...just kidding...
Got the updated pieces and parts installed and my 45-120 BC put back together today...and the 720gr T-Rex turned down a thou...they slip right in like I know what'um'doon...4.32" COAL, not touching lands but seated even with the 3rd driving band from the bottom, 0.535"...they're so BAAAADDDDD looking, I'm almost afraid to pick one up.
Fired off 10 rounds with H4831, RL22 and 7828 powders...worked load up until the base expanded to filled chamber and the primer started to flattened out...didn't chrono...cases popped out so the pressure should be well in the safety zone. I will post the case dimensions, Case Capacity, bullet specs etc., if someone has the software and is interested in working out the load data for themselves...but NO LOAD DATA AND NOT ON THE NET.
This is a very LONG bullet and has an SD ~.480 which means it will penetrate and keep on going and going and going.
A high SD is one of the BEST REASONS for using a LARGE, HEAVY BULLET...you get deep penetration...lots of Kinetic energy doing it's thing... and thick hides, large bodies, heavy horn, thick,heavy boned skulls don't stop bullets of this ilk.
Recoil was in the 60 ftlbs range with my 13 lb rifle...definitely a BIG push rather than a sharp, hard slap and DEFINITELY NOT for AtlLaws 45-70 girly-men
...hahahahahahaha...Just funning...Recoil is about like a 12ga, 3", 1 5/8 oz magnum duck/goose load in a 9 lb shotgun...not all that pleasant ,but tolerable. I wasn't any worse for wear after the 10 rounds, but I shoot a lot of big bores and I'm highly recoil resistant up to around 125 ftlbs at least.
Muzzle energy is over 4500 ftlbs, BC is ~.450, 100 yd energy is over 3800 ftlbs...plenty good enough for sage rats.
There is a TON more potential with this bullet in a Ruger #1/3, but as is, you can get near 458 Lott performance in the Handi at NEF safe pressure. The 45-120 has 20 gr MORE case capacity than the Lott, ~15% more, which keeps the pressures down while achieving similar velocities.
H4831 is the "fastest", then RL22 and finally 7282...
*ROUGHLY* 2 grains more powder, each step, faster to slower to equal pressure and velocity. I will chorno some of the loads as soon as the weather cooperates.
Beartooth has some very good information on their 525 Piledrivers and a video on the 525 Piledriver vs 12 water jugs....FAR OUT...but I don't think I would have stacked them on the back of MY pickup bed...you never know which way a bullet is going to go once it hits something hard.
You said a mouthfull Tim...I only shot lead bullets in pistols and 22's and ONLY when I couldn't get coated lead bullets or was forced into shooting lead for practice or was required to. WHAT THE HECK am I doing shooting lead at this late date for? DUH.
Luck