I shot 2 sets of 2 ladders with 2 different primers. Powder and seating depth were the same for each ladder test. I used .3 grain increments for the powder. Caliber is 22-250 and the barrel is factory with an HS Precision stock.
With the first primer, WLR, the point of impact shifted down and to the left with the 2nd ladder.
With the 2nd primer, Fed 210, the first ladder strung the holes up and to the right with the last 3 shots almost touching. The second ladder had the holes basically strung out horizontally.
So my question is: why the inconsistency between the ladders with both primers? I was using a front shooting rest with a sandbag under the rear of the stock. So the rest was the same, same temp, virtually no wind.
With the first primer, WLR, the point of impact shifted down and to the left with the 2nd ladder.
With the 2nd primer, Fed 210, the first ladder strung the holes up and to the right with the last 3 shots almost touching. The second ladder had the holes basically strung out horizontally.
So my question is: why the inconsistency between the ladders with both primers? I was using a front shooting rest with a sandbag under the rear of the stock. So the rest was the same, same temp, virtually no wind.