Your gun should shoot better than that. Adjust your powder charge by 5 grain increments until you get better groups. Powerbelt ELR are designed for your gun, so theoretically they should shoot well.
I sent mine back because I wasn't happy with the barrel. They sent back a target with a 2.5" 3 shot group at 100 yards and said it was fine. If you want to get fancy, you can get a bullet sizer and size other bullets to fit your barrel without a sabot. I use a 1/8" wool wad under mine and get fair accuracy with 777.
Consistency is the key to accuracy. Make sure you pour the powder evenly each time,, and ram the rod down with the same force each time.
Some people claim that the sabot needs to twist with the rifling on the way down or it will bung up the sabot and cause flyers. I bought a Spinjag and it does seem like I have fewer flyers. They make one designed for the ELR.
Some people believe that a too powerful primer will push the bullet down the bore before the powder fully ignites. I wouldn't think that would be a problem with large rifle primers, but you might want to try a non magnum primer.
I sent mine back because I wasn't happy with the barrel. They sent back a target with a 2.5" 3 shot group at 100 yards and said it was fine. If you want to get fancy, you can get a bullet sizer and size other bullets to fit your barrel without a sabot. I use a 1/8" wool wad under mine and get fair accuracy with 777.
Consistency is the key to accuracy. Make sure you pour the powder evenly each time,, and ram the rod down with the same force each time.
Some people claim that the sabot needs to twist with the rifling on the way down or it will bung up the sabot and cause flyers. I bought a Spinjag and it does seem like I have fewer flyers. They make one designed for the ELR.
Some people believe that a too powerful primer will push the bullet down the bore before the powder fully ignites. I wouldn't think that would be a problem with large rifle primers, but you might want to try a non magnum primer.