Same Velocities with two different powders

Iron Worker

Well-Known Member
Joined
Apr 3, 2004
Messages
2,293
Location
Reno Nevada
Shooting a 6x284 87gr V-Maxs. 53.5grs of H4350 produces 3650 with pressure signs.60.5grs of Magpro produces about the same velocity. But know pressure signs? Why? Does this have some thing to do with Chamber pressure vs muzzle pressure ? Tighter groups with Magpro also.
 

Tyler Kemp

Well-Known Member
Joined
Aug 10, 2006
Messages
1,500
Location
Columbia, MO
As an extreme example...Blue Dot in smaller calibers can produce high velocities with much less powder than usually used in these guns, aka, 223, 22-250, 243, etc.
 

Derek M.

Well-Known Member
Joined
Jul 12, 2004
Messages
2,417
Location
OHIO
As mentioned, the slower burning powder is producing equivocal velocity but less pressure, even though it takes more of it in grains. Sometimes the slower burn rate will produce even higher velocities with the same or even less pressure.

This is very similar to a 30.06 using 4350 v. Reloder 22 for a 180 bullet. You can just about overfill the .06 case with Re22 and compress the load, and still have unremarkable pressures. Yet the 4350 may not even come close to the neck with a max charge and have noticeable pressure. Velocities can be very similar or noticeably different.
 
Top