The Firing Line Forums - View Single Post - Small change in powder/big change in point of impact

Jack Straw · August 18, 2000, 01:02 PM

I've been working on hunting loads with my 7.5 inch Redhawk using 296 and RCBS 240SWC-GC. At 23.0gr, the POI is right on the bullseye (at 25yds). I get better groups with a max load of 25.0gr, but the bullets hit 4 inches to the left.

I can see how changing a load would change POI at 100yds with a relatively thin barreled rifle (ie..barrel vibrations being the culprit), but with the thicker barrel of the Ruger and at only 25yds, what else could really cause such a change in POI?

My plan is to stick with the 25.0gr charge and adjust the sights, but I was just curious as to what would cause a revolver to print that far to the left with a change in the load being taken into consideration. I'm not sure if I'm making any sense but I really don't know how to phrase my question.

Jack

August 18, 2000, 01:02 PM	#1
Jack Straw Senior Member Join Date: July 26, 1999 Location: Georgia Posts: 362	I've been working on hunting loads with my 7.5 inch Redhawk using 296 and RCBS 240SWC-GC. At 23.0gr, the POI is right on the bullseye (at 25yds). I get better groups with a max load of 25.0gr, but the bullets hit 4 inches to the left. I can see how changing a load would change POI at 100yds with a relatively thin barreled rifle (ie..barrel vibrations being the culprit), but with the thicker barrel of the Ruger and at only 25yds, what else could really cause such a change in POI? My plan is to stick with the 25.0gr charge and adjust the sights, but I was just curious as to what would cause a revolver to print that far to the left with a change in the load being taken into consideration. I'm not sure if I'm making any sense but I really don't know how to phrase my question. Jack