Help with 143gr Hammer Hunters in 7 rem mag

Try more jump and slowly increase powder til you find pressure, then back off 1 grain and shoot for groups.
Don't hesitate to jump .050 or more if you have room for powder.
Also need your twist rate😁
As GL said try more jump, I seat all of my bullets to the last PDR groove ( Powder charge allowing) and have never had to change anything
 
Oh wow ok, so seat them pretty deep then? I'll try .020 off and seating super deep and report back
 
Do you have a pic of where you seat one of your bullets? A loaded round I guess…bottom of the last groove, top of the last groove etc
 
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