Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel

Log In

A valid email is required.
Password is required.
Site Notices
Basic
Offline
  • Joined Nov 2011
  • Posts 18
  • EE 100% (10)
USA NY, USA
Posted: 12/26/2011 5:54:12 PM EST
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

Basic
Offline
  • Joined Aug 2004
  • Posts 16138
  • EE 100% (5)
USA MI, USA
Link Posted: 12/27/2011 3:41:55 AM EST

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.

Member
Avatar
Bronze
Offline
  • Joined Jun 2001
  • Posts 2750
  • EE 0% (0)
USA OH, USA
Link Posted: 12/27/2011 4:38:43 AM EST


4 inches would be a bit low for 25 yards with a 50 yard zero regardless of ammo.
Originally Posted By hoodonit00: I think some of you guys could suck the fun out of a machine gun shoot.
Basic
Offline
  • Joined Nov 2011
  • Posts 19
  • EE 100% (10)
USA NY, USA
Link Posted: 12/27/2011 7:08:19 AM EST
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

Top