375 Cheytac 135 gr retumbo 3400fps??

[Mag 300]

well took a chrono with to the range and its the first time shooting the new beast for me . took the load from the hide here but it was 80 degrees and the rifle has a 32" barrel.

loaded them .010 off the lands 135 gr retumbo fed 215M primer and a smk 350gr jammison brass

3402 FPS 8 in a row all read within 30 fps
checked the chrono with a 6 cm load that shows 3000 and it was 3021fps?
is the chrono off?? rechecked the center of the two ohler sensors and there 24" apart exactly

thanks Bill

 

[jasonk]

Re: 375 Cheytac 135 gr retumbo 3400fps??

Maybe back up some....gasses could be tripping the sensors.

 

[BLAWTON]

Re: 375 Cheytac 135 gr retumbo 3400fps??

Yea how far were you from the chrono? You should be 12' i have never had a problem like that at that distance.

 

[Mag 300]

Re: 375 Cheytac 135 gr retumbo 3400fps??

I was about 5 feet
per the manual it should have been 8 feet will try 8 and 12 feet next time