My gun is a 309JDJ, which is the 444 Marlin case necked down to 30 caliber. It drives a 150gr Ballistic tip to 2500fps, and the 165gr to 2400. Its been a great barrel for deer, and I took a mountain goat with it in Alaska. The blacktails here are small, and I happened to have a box of the 125's lying around to play with.
I got 2650 with 150's with my 309 JDJ. It was the second most accurate handgun I owned. I would expect the 125's should do maybe near 2800.
