Originally Posted by load
what are you shooting to hit 2900? 8mm mag?
Sorry, I missed your question.
Actually it is a .45 muzzleloader that shoots smokeless powder.
These are 250 grain 0.338 Accubonds, but the sabots are similar for the SMK's.
I have used, and my main bullet is the 150 grain 30 caliber Accubond. Depending on powder I can get over 3200 fps with about 80 grains of powders with N120, I 4198, Norma 200, and rel 7
The huge advantage of not having a case is that your load is only limited by your imagination.
The disadvantage is that without a case is that it is very hard to raise pressure so duplex powder loads are sometimes needed.