Carphunter
Member
- Joined
- Jan 31, 2005
- Messages
- 52
This weekend, I got a chance to bang away with my new toy, used nickel Sig 226.
For s & g's, I was shooting over my chrono with several different factory loadings.
I noticed in my strings of ten shots per ammo type, I was seeing some real interesting variations in velocities.
With Wolf 115 FMJ, UMC 115 FMJ, Fiocchi 115 HP, and Fiocchi 124 FMJ, I'd get some some shots that were within 50 fps of each other, but then I'd get rounds that would drop considerably.
I don't have my notes in front of me... so I'll use B.S. numbers... but they do represent the variation I'd see. I might get 8 shots at 1500fps, but two at 800 or 900. Also might get a way hot load up at 2000.
THe only ammo I shot that day I didn't see that kind of variation on was some old Remington green box 124 fmj.
So... is that kind of variation in factory ammo common?
FYI, the low-power shots were not first out of the barrel, or last. So I don't think I was seeing some variation of cooking the ammo.
Or, could the Sig in some way have an issue that could cause this? (I don't know...light spring that allows ejection too soon).
Or would you suspect chrony error? (I shot some three-shot strings of rifle rounds over the chrony that day...and saw no weird readings.
For s & g's, I was shooting over my chrono with several different factory loadings.
I noticed in my strings of ten shots per ammo type, I was seeing some real interesting variations in velocities.
With Wolf 115 FMJ, UMC 115 FMJ, Fiocchi 115 HP, and Fiocchi 124 FMJ, I'd get some some shots that were within 50 fps of each other, but then I'd get rounds that would drop considerably.
I don't have my notes in front of me... so I'll use B.S. numbers... but they do represent the variation I'd see. I might get 8 shots at 1500fps, but two at 800 or 900. Also might get a way hot load up at 2000.
THe only ammo I shot that day I didn't see that kind of variation on was some old Remington green box 124 fmj.
So... is that kind of variation in factory ammo common?
FYI, the low-power shots were not first out of the barrel, or last. So I don't think I was seeing some variation of cooking the ammo.
Or, could the Sig in some way have an issue that could cause this? (I don't know...light spring that allows ejection too soon).
Or would you suspect chrony error? (I shot some three-shot strings of rifle rounds over the chrony that day...and saw no weird readings.