i don't really have a dog in this fight,,,,BUT
i'm with hawg on this one,, i have been shooting BPCG for a looong time,,and i have a high wall that i worked up a load for that is 72gr ffg,, with a 530 gr bullet,,,now the front 2 driving bands are bore dia. and are into the grooves and lands when the round is loaded,,i also have a couple of sharps rifles that like the powder in the 70-71 range
if you are planning on seating a 500gr plus bullet and covering all the grooves you are gona have a hard time getting that much powder in a 2.1 case unless you compress the heck out of the powder
also to get that much powder in the case you need to settle the powder,, most guys are using a drop tube,,,my tube drop tube is 30" long,, makes a big difference,,kinda like bumping the barrel on a muzzleloader to settle the powder there
i would like to know the twist of the barrel and the diam. of the bullet,, and the alloy,,if the alloy isn't soft enough it can't bump to the bore and you will have a loose fit and that is what will generally upset the bullet in flight
for the twist,, faster for heavy bullets,, slower for the lighter bullets,,,,,1-18 oh maybe 500-550gr,,,,1-20 oh maybe 350-450gr.,,,,,BUT there are exceptions to every rule!!
that's my .02 YMMV
ocharry
i'm with hawg on this one,, i have been shooting BPCG for a looong time,,and i have a high wall that i worked up a load for that is 72gr ffg,, with a 530 gr bullet,,,now the front 2 driving bands are bore dia. and are into the grooves and lands when the round is loaded,,i also have a couple of sharps rifles that like the powder in the 70-71 range
if you are planning on seating a 500gr plus bullet and covering all the grooves you are gona have a hard time getting that much powder in a 2.1 case unless you compress the heck out of the powder
also to get that much powder in the case you need to settle the powder,, most guys are using a drop tube,,,my tube drop tube is 30" long,, makes a big difference,,kinda like bumping the barrel on a muzzleloader to settle the powder there
i would like to know the twist of the barrel and the diam. of the bullet,, and the alloy,,if the alloy isn't soft enough it can't bump to the bore and you will have a loose fit and that is what will generally upset the bullet in flight
for the twist,, faster for heavy bullets,, slower for the lighter bullets,,,,,1-18 oh maybe 500-550gr,,,,1-20 oh maybe 350-450gr.,,,,,BUT there are exceptions to every rule!!
that's my .02 YMMV
ocharry