Originally Posted by bronko22000

I snuck out this morning to try out the new LH Lyman .54 GPR flintlock. Even before I left I called the gun shop yesterday and told him to get me two RMC vent liners. I knew I was going to need them.
The weather was about 70* and about 90% humidity.
All shots were made using a Hornady .530" ball and .018" pillow tick patch. Swabbing between each shot with T-17 patch/dry patch.
I shot the first target using 80 gr of FFg at 25 yds. As you can see the very first shot just caught the bottom of the paper. After a sight adjustment shot #2 about 1 1/2" below the bottom of the bull.
Then after another sight adjustment I shot #3, 4 and 5 and they grouped really nice. I thought I had this rifle figured out already.
Target #2: I shot the same 80 gr load at 50 yds. As you can see, 2 shots hit paper. Don't know where #3 is?
Target #3: I bumped up the charge to 90 gr and shot a 'decent' group with a new rifle. But I have to admit, the stock vent liner along with the humidity was giving me fits.
Target #4: This time I went up to 100 gr. The first 2 shots were touching. Then I had a long delayed hang fire which I discounted. I loaded up the third shot and shot just above the other 2.
All in all it was a decent shoot. Rushing to try and beat what looked like impending rain.
It does appear though that this rifle is going to be a powder hog.
I have the rear sight raised up as high as I dare without losing the screw/spring. Looks like I will be filing the front sight down about 1/16" - 3/32".