Hey folks!
Having some POI/Grouping issues with a rifle ive never had issues with...
6.5PRC
Defiance Anti Action
CF Bartlein Barrel - round count ~700
XLR Envy Pro Chassis
Kahles 525i
The above rifle consistantly shoots 1/2" 5 shot groups. After a PRS match i decided to clean it as i was getting some decreased velocity numbers (around 50 fps slower @ 2950fps) and was hoping there was just some build up in the chamber. I cleaned it and the barrel all the way down to white patches.
Additionally, I changed muzzle devices from the TBAC Ultra 7 to the 419 Hellfire.
When I took it to the range I noticed the gun was not grouping after 20 rounds. I thought this was excessive so I checked my action screws and bases. I shot 40 more rounds, and the gun still was not grouping. FPS was normal @ 2944
I took the gun home and double checked my ammo lot numbers, pulled the action and re-set the action in the chassis.
I took the gun back to the range and shot a 1" 5 shot group with a POI 1 inch high from my aiming point. As I took shots 6-10 I noticed the group expand to 2 inches with all of the shots low 1" of aiming point. My imediate thought was that the gun must be hot for shots 6-10 so i shouldent expect much more out of it.
To verify, I let the gun cool down and shot another 5 shot group. This time, the POI was 1" low of aiming point. Shots 6-10 were dispursed 1-2" low.
I let the gun cool down again and shot a 5 shot group. This time the POI was 5" low of aiming point.
I let the gun cool down again and shot a 3 shot group.... 3" low.
I packed up my stuff and went home.
Any advise from the pros out there would be greatly appreciated.
Having some POI/Grouping issues with a rifle ive never had issues with...
6.5PRC
Defiance Anti Action
CF Bartlein Barrel - round count ~700
XLR Envy Pro Chassis
Kahles 525i
The above rifle consistantly shoots 1/2" 5 shot groups. After a PRS match i decided to clean it as i was getting some decreased velocity numbers (around 50 fps slower @ 2950fps) and was hoping there was just some build up in the chamber. I cleaned it and the barrel all the way down to white patches.
Additionally, I changed muzzle devices from the TBAC Ultra 7 to the 419 Hellfire.
When I took it to the range I noticed the gun was not grouping after 20 rounds. I thought this was excessive so I checked my action screws and bases. I shot 40 more rounds, and the gun still was not grouping. FPS was normal @ 2944
I took the gun home and double checked my ammo lot numbers, pulled the action and re-set the action in the chassis.
I took the gun back to the range and shot a 1" 5 shot group with a POI 1 inch high from my aiming point. As I took shots 6-10 I noticed the group expand to 2 inches with all of the shots low 1" of aiming point. My imediate thought was that the gun must be hot for shots 6-10 so i shouldent expect much more out of it.
To verify, I let the gun cool down and shot another 5 shot group. This time, the POI was 1" low of aiming point. Shots 6-10 were dispursed 1-2" low.
I let the gun cool down again and shot a 5 shot group. This time the POI was 5" low of aiming point.
I let the gun cool down again and shot a 3 shot group.... 3" low.
I packed up my stuff and went home.
Any advise from the pros out there would be greatly appreciated.
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