Originally Posted by
Rapier
Wolfdog, good to see you are looking into increasing the performance of your AR platform. Bruce has some great cartridge designs, over 30, to his credit. Many of his designs have been copied and changed a bit, with a rename by the big cartridge makers. The 7mm Val brass is now offered by Star-Line. The 24 Varmit is the 7mm Val necked down and blown out, both based on the 6.8 SPC case. I just finished up a 24 Varmit build with an 18" 1-8 twist SS barrel, interesting concept, and Varmint Magazine did a two year series of tests on the cartridge in the AR platform with a good write up. Was originally the 24 GPC, changed the name to the 24 Varmint as a tribute to Varmint Magazine for taking the time and effort to do a fair test of the cartridge and the chambering in the AR-15 platform. Pictures of my 24 brass in forming stages before the name change. The 24ff is fire formed. Makes for a very versatile 6mm semi auto rifle.