lovec_1
Active Member
Hi guys, hereby I'm asking for any help.
Here is the story: I shoot older Sako rifle, it has 24.5" long factory varmint barrel with 8.66" twist. Last two seasons I've shot Berger Hybrid 180gr. very successfully. But I love to try always something new and different. So I bought two boxes of Hornady ELD-X 175gr. Also have brand new Sako cases with measured capacity 87.7gr of water - little bit bigger then usual.
First attempt: bullet seated 0,02" off the lands, five loads with Norma MRP-2 from 68.0 up to 70.0gr., velocities between 2877-2985 fps. Accuracy - terrible. At 300 meters I got wild groups around 5 to 8 inches. Useless.
Second attempt: I was told to try bigger jump. So I prepared five loads with 0.39"-0.59"-0.79"-0.98"-0.118" jump. Loaded with reduced amount 66.5gr. of Norma MRP-2. Best 5-shot group at 300 meters measured roughly 4.5"-5". Again nothing world-shattering.
Third attempt: Tried more jump. Also a less jump, closer to the lands. So this time jumped 0.004"-0.008"-0.118"-0.138"-0.157". Loaded with 65.0 gr. of H1000 and with 66.0 gr. of Norma MRP-2. No luck again except one load.
Three shots at 300 meters, load of 65.0gr H1000 jumped 0.157" gave me unbelievable group of 0.90". Very happy with it but it's terribly slow, only around 2690 fps.
After this I tried faster loads with 0.157" jump. I've loaded again H1000, Retumbo and Reload Swiss RS62 (similar to Reloader 16). I got higher velocities but again nothing worked. Holes spreaded all over the target, no grouping.
So the question is - I never give up - where would you start again after all this? Any advice, criticism or idea is highly appreciated.
Thx.
Here is the story: I shoot older Sako rifle, it has 24.5" long factory varmint barrel with 8.66" twist. Last two seasons I've shot Berger Hybrid 180gr. very successfully. But I love to try always something new and different. So I bought two boxes of Hornady ELD-X 175gr. Also have brand new Sako cases with measured capacity 87.7gr of water - little bit bigger then usual.
First attempt: bullet seated 0,02" off the lands, five loads with Norma MRP-2 from 68.0 up to 70.0gr., velocities between 2877-2985 fps. Accuracy - terrible. At 300 meters I got wild groups around 5 to 8 inches. Useless.
Second attempt: I was told to try bigger jump. So I prepared five loads with 0.39"-0.59"-0.79"-0.98"-0.118" jump. Loaded with reduced amount 66.5gr. of Norma MRP-2. Best 5-shot group at 300 meters measured roughly 4.5"-5". Again nothing world-shattering.
Third attempt: Tried more jump. Also a less jump, closer to the lands. So this time jumped 0.004"-0.008"-0.118"-0.138"-0.157". Loaded with 65.0 gr. of H1000 and with 66.0 gr. of Norma MRP-2. No luck again except one load.
Three shots at 300 meters, load of 65.0gr H1000 jumped 0.157" gave me unbelievable group of 0.90". Very happy with it but it's terribly slow, only around 2690 fps.
After this I tried faster loads with 0.157" jump. I've loaded again H1000, Retumbo and Reload Swiss RS62 (similar to Reloader 16). I got higher velocities but again nothing worked. Holes spreaded all over the target, no grouping.
So the question is - I never give up - where would you start again after all this? Any advice, criticism or idea is highly appreciated.
Thx.