I've been wondering if you guys see much difference in the loads developing for two bullets that are the same weight but of different construction, as in the tip, or Boattail vs. Flat base
For example, in a .277 bullet for .270wsm, I have a box of Nosler 140gr Accubond Spitzer, and also 140gr Partition Spitzer (sectional Density exactly the same, Ballistic coefficient quite different, so..)
the weight is the same but shape, distance to lands, etc. fairly different.
So, if I work up a fine load for the Accubond, will I be able to start close to that same grain load for working on the Partition ??
Or, is it start all over again.
Working with .308 bullets in 180gr, for 30-06 lately I found the diffference to be very close between a Speer Round Nose, and Mag Tip (tho those are nearly identical bullets) and also a Hornady SST Interlock, which is a boattail, the others are not (that ideal load was very close to the Speers)
(in fact for IMR 4350, all 3 were at either 54 or 54.5 as best for accuracy)
I'm thinking I can take some short cuts on going all the way back to Minimum and working back up with the differently constructed bullet,yet, same powder, rifle, etc.
What have you guys seen on this ?