Which Mark ? does Ross mk 3 prefer?

[tokguy]

Which Mk of cartridge does a Ross mk3 perform best with? I am planning on taking my Ross coyote hunting and it's a PITA shooting at distance as the POI doesn't correspond with the POA.
Thanks
Tokguy

 

[jakester]

The Mk3's were originally sighted for the Mk7 round (ie.174gr spitzer bullet). You could regulate your sights for whichever round you wish to use. Lately, I've only seen 303 hunting rounds with a 180gr projectile. You can find Hornady 150 gr slugs from time to time and you can load them to around 2700fps out of a Ross Quite easily. Is your POI above or below POA. The 150's generally print lower than the 174's or 180's for any given rifle.