Motard
10-17-2015, 08:28 AM
Cause availability resctriction I am stuck on Vhit N130 powder for my Marlin 18,5 inch barrel. I have developed until now good rounds with Lyman 457643, 400 gr mould and Lee 405-457 HB. Both dropping nearly 425/427 gr bulletts with .459 dia wich are perfect for my barrell (.456 sludge, no sizing needed). Average speed varing from 1.440 to 1.560 with 37 up to 38,5 gr of powder.
Now I would start to develop some hotter loads. Lyman 49 Edition Manual reports 21,400 Cup pressure for 41gr of Vhit n130 and 26,200 for 46,5 gr (medium strenght action rifles) and rise 38,700 Cup with 51,0 gr on strongher actions rifles. I am not interested to reach this peack, but would assume that 43-44 gr would jet be safe and handly? Or I am wrong?
PS: with a cast 385 bullet in front of 47,5 gr n130 I had record 1.850 fps, and a HUDGE recoil :(
Now I would start to develop some hotter loads. Lyman 49 Edition Manual reports 21,400 Cup pressure for 41gr of Vhit n130 and 26,200 for 46,5 gr (medium strenght action rifles) and rise 38,700 Cup with 51,0 gr on strongher actions rifles. I am not interested to reach this peack, but would assume that 43-44 gr would jet be safe and handly? Or I am wrong?
PS: with a cast 385 bullet in front of 47,5 gr n130 I had record 1.850 fps, and a HUDGE recoil :(