I was able to go out to the starling farm today and did some shooting with my M60B. I haven't been shooting my M60B for a while now and I was missing a lot of my shots especially out passed 50 yards. It was a bit windy and cold so I thought I missed because I got the windage wrong.
After missing a few shots, I decided to put up my target box at 32 yards and check my POI and windage. Yup, the windage was off to the left and the POI was much lower than before. I got out the FX Chrony and found out my current speed of the NSA 17.5gr was 888 FPS compared to the reading of 920 FPS back in May. 32 FPS dropped in velocity was a lot and hence it changed all my POA with my turrets tape.
I entered the new data into the Element Ballistic Calculator and got a new POA range data. I marked out the new POA at each distances on my turret tape and went back to shoot starlings. I was able to drop starlings with the proper windage allowance. Luckily I brought my radar and did some testings; Otherwise, I would have missed all of my shots today.
So check the speed of your projectile to make sure you make the POA adjustment accordingly.
Video to follow this Saturday.
After missing a few shots, I decided to put up my target box at 32 yards and check my POI and windage. Yup, the windage was off to the left and the POI was much lower than before. I got out the FX Chrony and found out my current speed of the NSA 17.5gr was 888 FPS compared to the reading of 920 FPS back in May. 32 FPS dropped in velocity was a lot and hence it changed all my POA with my turrets tape.
I entered the new data into the Element Ballistic Calculator and got a new POA range data. I marked out the new POA at each distances on my turret tape and went back to shoot starlings. I was able to drop starlings with the proper windage allowance. Luckily I brought my radar and did some testings; Otherwise, I would have missed all of my shots today.
So check the speed of your projectile to make sure you make the POA adjustment accordingly.
Video to follow this Saturday.
