I also think you should go up in patch size.
You will be able to get that ball down the muzzle with a .015 patch, it will just take a little more effort. If you are hitting the target at 100 with your undersized patch you will be hitting X's at 100 soon enough if you fine tune that load.
You will be able to get that ball down the muzzle with a .015 patch, it will just take a little more effort. If you are hitting the target at 100 with your undersized patch you will be hitting X's at 100 soon enough if you fine tune that load.