I have had some interesting PPB experiences over the weekend and a graph I have kind of sums up the ballistic part of it. mtngun, How can I insert a picture or a cut and paste from excel or word into a page here? I am sure it is obvious but I am kind of dense...maybe its the lead.
I think maybe I am trying to push these ppb too fast, either that or I need to start hunting the elusive "broad side of barns". My target back board is 24" x 30" and only 14 out of 25 rounds hit it at 80 yards. Now maybe my scope was knocked off alignment because I had it in the back seat of the car, with no case, on a recent trip to a friend's house. This weekend my time was rather limited. I didn't have any proven rounds available and just tried to sight-in with the PPB. There is a small canyon between my shooting bench and my target so I can't really move it in to get closer. Between 15 and 75 yards its very verticle. I'll try again with slower loads this coming weekend and have some of my standard 250g round nose loads available for comparison. With this rifle (35 Whelen) I have been getting 1.4" groups of 5 shots including the persistent flyer. 4 of the 5 shots have typically been around 0.8" for my better loads and some better. This is at 80 yards so the 100 yard comparison would be somewhat larger groups. Regardless, I know this rifle shooting in this bullet weight will produce reasonable groups. The rifle is a well done Mauser 98 conversion with a Douglas Barrel.
I am using a Busnel 6x-24x, 40mm, 1 inch scope. There is some parallax, which is fairly manageable, with this scope even at these short ranges and that is probably 1/2 of my typical error. I need to upgrade to a better scope but there always seems to be something else to buy first. I do this sort of shooting with a lead-sled with about 25lb of lead on it. I use the sled for two reasons. First I am really trying to differentiate the characteristics of the loads as opposed to my shooting ability and second, I typically shoot between 100 and 200 rounds on a good day and the Whelen with 250 G bullets flying out at 2500 FPS provides a pretty good workout for an old fart like me.
More to follow when I get the graph inserted here. let me know how., Thanks mtngun