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3/20/2017 5:03:23 PM
Posted: 12/26/2011 6:54:12 PM EDT
Heres my question i have a p90s with the factory optic usg model with black reticle, my question i am useing the fn ammo hollow points i believe 28 grains i sighted it dead on at 50 yds but at 25 yds its dead on but 4 inches low back to 50 and its dead on first time i have seen this. Any body know why? Thanks
Link Posted: 12/27/2011 4:41:55 AM EDT

Originally Posted By rbrown0067:
Heres my question i have a p90s with the factory optic usg model with black reticle, my question i am useing the fn ammo hollow points i believe 28 grains i sighted it dead on at 50 yds but at 25 yds its dead on but 4 inches low back to 50 and its dead on first time i have seen this. Any body know why? Thanks

The height over bore on the P90/PS90 is pretty bad - look at the height of that optic over the center of the bore. The 5.7x28 cartridge also has a maximum effective range of just under 200m.
Link Posted: 12/27/2011 5:38:43 AM EDT


4 inches would be a bit low for 25 yards with a 50 yard zero regardless of ammo.
Link Posted: 12/27/2011 8:08:19 AM EDT
thank you for responding looking at the chart then looking at my target I'm actually a little lower then dead on at 50 yd so that would explain it, thanks again
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