View attachment 1065179 View attachment 1065180 I hunt ghogs and prefer fast accurate cartridges. I had a 6x45(223 parent) but could not get enough speed to fight the wind that is a given where I hunt. Powder choice was partly to blame. The 6x45's neck is short and i like no freebore barrels and enough neck to test a variety of seating depths. I had JGS make a 6x45 reamer that pushed the shoulder back .047, changed the shoulder angle to 30° and remove all but .010 case taper. Chamber neck is .268, so I had to turn necks, esp since lower neck is now thick shoulder brass...A little reaming also...by now I was not sure about this project. I had previously modified the 222 Rem and found LT 30 to be a superb propellant, so it was tried, starting around 25 gr with 60 gr old Berger MEF bullets. Accuracy was fantastic with many groups in the ones. MV was 3350+- , bolt lift very easy and cases didn't need bumping. My barrel is a 26 " , 14 tw Kreiger. Charges were gradually increased till at 26.8 I got 3500 with the Berger's and no excess pressure signs! This case still has enough room for .3-.5 more LT 30, but I resisted. I've tried 61-62 gr match bullets and the accuracy is amazing. LT 30 seems to be largely responsible, while case shape must have a lot to add. Bolt lift is so easy and primer pockets are staying tight. I'm currently trying custom bullets for accuracy while hunting with the MEFs.
