.260 Remington

[Dimefox]

This either a really good or really bad 5 shot group lol. Final seating depth test on this deer rifle. Probably plenty good enough for hunting. Going to load more up and run another 5 or 10 shot group to see where the point of impact actually lives.

260 Rem
AnTi
Proof steel 3B Bugnut Prefit
127 gr LRX
RL 17 @ 42.70 gr
Fed 210
Lapua brass
2845 fps avg
ES 19.7
SD 7.6

Was 30 deg out the other morning when I shot this. First outing with the Garmin. Shot this load a couple of weeks ago when it was 60ish out with a Magnetospeed and averaged 2917 fps. I thought RL was more temp stable..maybe its the chrono difference...idk.

 

[secondofangle2]

RL17 is exquisitely temp sensitive (up to 3 fps/degree); I abandoned it for this reason. RL16 is supposedly temp stable.

 

[Dimefox]

RL17 is exquisitely temp sensitive (up to 3 fps/degree); I abandoned it for this reason. RL16 is supposedly temp stable.

Ah shit. I must have gotten the two mixed up in my mind. Not a total deal breaker..I hunt big woods and think Ive taken 1 shot over 250 yards in 30 something years.

 

[lash]

Ah shit. I must have gotten the two mixed up in my mind. Not a total deal breaker..I hunt big woods and think Ive taken 1 shot over 250 yards in 30 something years.

Not all is lost. You have two data point temps and their respective velocities. They show an average of 2fps per degree of change. An easy calculation that can even be entered in many ballistic calculators.

You can even verify this by shooting at another data point temp and seeing how close that gets you.

 

[jambau]

Same here. If I'd have found a better shooting, consistent load at 2700fps I'd have stuck with it