The Firing Line Forums - View Single Post - Bullet Trajectory different than computer model

**Mal H** · August 10, 2005, 12:18 AM

Something really strange is going on ethernectar.

You say that, in essence, you zeroed the rifle at the 800 yard point. Yet when shooting at 1000 yards with about 4 clicks added elevation, the rifle is shooting 20+ clicks high which is 5 MOA. At 1000 yards 5 MOA is about 52 inches high.

I plugged in your data into the Sierra Infinity calculator using the same bullet and MV. When zeroed at 800 yds, the drop should be around 82 inches at 1000 yds. Allowing for the 4 clicks or 1 MOA you added from 800 to 1000 yds, that means the POI should have been around 72 inches low. You are actually getting about 134 inches elevation when going from 800 yds (zero) to 1000 yards. ???

I don't supose someone else was shooting at your target by mistake?

Ooh, ooh! I just had a thought! (No comments on that, please.

)
How high off the ground is the target at 1000 yards? Would 72 inches low mean the bullet is hitting the ground in front of the target? IOW, could you be getting a bouncer?

August 10, 2005, 12:18 AM	#13
Mal H Staff Join Date: March 20, 1999 Location: Somewhere in the woods of Northern Virginia Posts: 16,955	Something really strange is going on ethernectar. You say that, in essence, you zeroed the rifle at the 800 yard point. Yet when shooting at 1000 yards with about 4 clicks added elevation, the rifle is shooting 20+ clicks high which is 5 MOA. At 1000 yards 5 MOA is about 52 inches high. I plugged in your data into the Sierra Infinity calculator using the same bullet and MV. When zeroed at 800 yds, the drop should be around 82 inches at 1000 yds. Allowing for the 4 clicks or 1 MOA you added from 800 to 1000 yds, that means the POI should have been around 72 inches low. You are actually getting about 134 inches elevation when going from 800 yds (zero) to 1000 yards. ??? I don't supose someone else was shooting at your target by mistake? Ooh, ooh! I just had a thought! (No comments on that, please. ) How high off the ground is the target at 1000 yards? Would 72 inches low mean the bullet is hitting the ground in front of the target? IOW, could you be getting a bouncer?