Thanks Lewis.
I will be shooting some more of the 450gn PP bullets. I like that size/weight and would even go for some 400gn if they made them. I also think 550gn is too big for this twist, but, I am trying those GG bullets just as a lark. At 50m I didn't have any sign of keyholes but I bet at 200m and maybe even 100m they will start to tumble.
I am using the Ampco/Tresco nipples. I have two so am monitoring the one in the gun to see when it starts to erode. So far the same drill bit will go through both the used one and new one.
I am also weighing charges on most of my loads. I use an electronic scale so the charges are all within .1gn. I say most of the loads because when I try a change at the range, as I did with the Hornady bullets, I will use the measure. Not as accurate I know. But, in that case weighed 80gn charges were horrible and measured 100gn charges were less than half the size. I will try them with weighed charges next time. I also do not weigh RB charges yet.
And, it is due to your experience that I am trying the veggie wads. I agree with your conclusions.
Another thing I have not tried yet is the single wrap paper system. That is also on my 'list' of things to try.
Keep in mind this is a relatively new gun and I have less than 200rd through it. This was my first range session with this gun where I was carefully monitoring what was going on with each load. As such I am also going to try using the felt wads again in a more careful back to back comparison.
What I have not liked before is swabbing before loading the powder. I just did not like it. Loading the powder, wad and then swabbing was much better for me. YMMV
Now I will try to focus on just a couple of variables per range session to see if I can get the groups down smaller. Yes, my goal is to get 1" groups at 100yds.