@ 05:07 am (GMT) |
Ben GradyRe: 25-06 Tikka vs 25-06 P17 Interesting Results.O.k I have been at my hunting block and completed some drop tests that I need help working out the velocities.I only did drop tests for the P17 25 06 as that seemed to have a fast barrel. I shot both loads 117 gr Pro hunters and 75 gr V-max. They were shot at 100 yards and 337 yards (337 yards because that was a clear shooting platform at my hunting block). 117gr Prohunters shot at 100 yards and then at 337 yards. Three shot groups of both. The drop was 105mm. 40mm group at 337 yards. 75 gr V-max the drop was 39mm. Similar group at 337 yards. What velocities does this give me when worked from the drop test? I don't know how to work it out. When chronographed 3200 fps for the 117gr Prohunters and 4056 fps for the 75 gr V-max. (but thinking the chrony is not reading correctly). |
@ 06:15 am (GMT) |
Thomas KitchenRe: 25-06 Tikka vs 25-06 P17 Interesting Results.hi Bentry down loading the shooter app punch in all the info and see if the drops works out right. you can play around with the figures until it matches up to. |
@ 11:11 pm (GMT) |
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@ 11:37 pm (GMT) |
Ben GradyRe: 25-06 Tikka vs 25-06 P17 Interesting Results.The three bullet holes with the circle drawn around them are the 117 gr prohunters shot at 100 yards.The three with the X are the 75 gr V max shot at 100 yards (Very similar point of impact). The two triangles are the V max at 337 yards shot at a target to the left and blown to the other target because of the wind, the third triangle hit the target to the left. The three shots on the cardboard are the 117 gr Prohunters at 337 yards, blown to the right. The 117 gr pro hunters at 337 yards are about 105 mm below the 100 yard target. So do I work out the drop of 337-100 = 237 yards for a 117 gr bullet = 4.17" drop = 104.25mm drop with a velocity of 3300 fps. And for the 75 gr Vmax 237 yards for a 75 gr bullet = 2.48" drop = 62mm drop at 4025 fps. |