I have the LTR in .50 cal. You will need some 3/4" X 3/4" Tom Fuller
Black English flintsfrom Track of the Wolf. The 3/4" X 7/8" flints
will be to long due to the short profilehammer on the LTR. I install
my flints bevel up for best results. I place a paper match crossways
between the flint & frizzen at half cock, then tighten the flint down
against the match. This squaresthe flint to the frizzen and gives the
proper flint gap between the two. "The manual won'tlistflintmounting
information"

The kick won't be determined so much by caliber, but bycharge and bullet
weight. A rule I live by, if you don't need it, don't use it. Meaning, just
because your hunting big game doesn't mean you will need to use the Max
charges with Max bullet weights. No need punishing yourselfwith
something you should be enjoying. Start light and work your way
up "especially" with a flintlock.

The only problem I have ran into was, I installed a hexed vent liner and
I had poor results with it. A bad delay in ignition. The slotted vent (comes
with the rifle)works fine.

I have been shooting 80gr Goex 3F .015 permatex lubed patches .490" RB
and using Goex 4F in the pan,with good results. I've tried the 320gr
R.E.A.Lconicalsbut haven't found a satisfactory group with those yet.
This doesn't mean it won't shoot them, it's just thatI haven't put the
time in those to find out.

(Yes)I'm happy with the rifle and it's performance, and Lyman has been
great to help with questions as well as the guys here on the forum.

Have fun there a Blast!