[hop_randall]

The other weekend my uncle and I were out patterning our shotguns. He pulled out his chronograph just to play around with it. My Kent fasteel patterned great and the speed was right around their advertised 1560 fps. When it came to my uncle who was using Remington Sportsman Hi-Speed Steel his patterned decent but only flew at average of 1250 fps. No where near their advertised 1550 fps. Has anyone else had this with any other ammo? I actually never thought to check the speed but after this im going to be alittle more skeptical about new items claiming hi velocity. Maybe I'll just stick to my Kent Fasteel.

 

[Tal/IL]

Sounds odd that they would be that far off. Wads and buffering and shot stringing can make for odd readings with chronos sometimes. Are you sure you were getting good readings?

 

[hop_randall]

Well im not sure how to tell if it is a good reading but all my shots read at the speed they were supposed to and his didnt.

 

[Thomas Krupinski]

Well im not sure how to tell if it is a good reading ....

That's the problem. Unless you can replicate the exact same conditions for the shot only traveling through the chrony, while removing potential variables such as wads, buffer material and such giving false readings, you can't establish a comparison.

 

[blunder]

Bet you were taking the reading at 3-6 ft instead of measuring at the muzzle. I am quite suprised at your readings on the Kent, not the readings on the Remington.

tom

 

[Bug Doc]

Are you sure it was the 1550fps loads of Sportsman and not the 1300fps loads? I've never heard of a discrepancy that large before. If it was the faster load I'd contact Remington about getting replacement ammo.

I've heard stories about ammo being 1-200 fps slow back in the early days of steel shot, but nothing that large recently.

 

[hop_randall]

The instructions on the chrono said to place it 5 feet from where you are shooting. Also I am sure that it was the 1550 fps ammo and not the 1300. I'm not trying to argue with you guys so please dont take it that way but i was wondering how manufacturers measure the velocity of their shot? I would think they run into the same problems we do when trying to measure the velocity.

 

[Bug Doc]

hop_randall,
Manufacturers measure velocity at 3 ft from the muzzle. If you were measuring at 5 ft you would see a small difference, but I don't know how much it would be. I can't believe it would be 250fps. I'd still contact Remington.