Thunderclapper
Active Member
- Messages
- 254
Shooting with my kids today we chronographed some shots just for fun. My daughters .243 shot 2944 FPS pretty consistantly. I brought a recently purchased (used) Remington KS Mountain Rifle. It's in great shape and appears to have fired very few rounds. I decided to shoot some Federal Premium factory loads with 180 gr Partitions, just to get the gun on paper. The first shot felt great but I was shocked when I looked at the chronograph. It read 3816 FPS. I checked the case for pressure signs, then fired another round. 3726. Second case looked the same. Third round 3750.
My first thought was that these #'s aren't even possible and have to be a mistake of some kind. However, my daughters .243 was consisant. Can I rule out the chronograph?
A second thought I had was that I should see extreme signs of high chamber pressure. The spent cartridges looked to me like other "hot" loads I've seen in the past, but not extreme.
Lastly, while working up loads for other rifles in the past I've noticed recoil elevate with the powder charge. At 6 3/4 pounds this rifle is frisky but not punishing. Today the recoil didn't seem unusual.
Any Ideas?
My first thought was that these #'s aren't even possible and have to be a mistake of some kind. However, my daughters .243 was consisant. Can I rule out the chronograph?
A second thought I had was that I should see extreme signs of high chamber pressure. The spent cartridges looked to me like other "hot" loads I've seen in the past, but not extreme.
Lastly, while working up loads for other rifles in the past I've noticed recoil elevate with the powder charge. At 6 3/4 pounds this rifle is frisky but not punishing. Today the recoil didn't seem unusual.
Any Ideas?