Shot another two targets since lightly lapping the barrel. Barrel is getting
smoother and starting to see better groups. First target is .385 casted balls
from a mold I made awhile back. Hard to cast for some reason, didn't group well
My shooting skills need to be improved. I think I will get 2" groups at 50 yards soon.
Judging from the last target, 4 shots in 1", at 50 yards (150 ft) would be
3" group. Hope to do more shooting before it gets really cold. Picture below
targets shows I am swagging the .395 balls to .386. Going to try .387 as I
can see light in the rifling when I push a ball into the barrel.
October 15, 2008
After a few long weeks of work and being to to busy, I was finally able to
build an apparaus to button rifle at a steady rate. Still have much to improve
on the machine such as slowing down the rate of rifling speed.
I tried to keep it at about 30 seconds per barrel, but
think one went much faster. In the article I have at the bottom, I read about
buttons sometimes slipping and the true twist rate will not be uniform. I
suppose this must happen as I saw it in previous experiments. I thought that
mine twisted fairly consistently.
Caliber .385 pictures of 2 barrels. Hard to get good picture of rifling.
Results of .385 Barrel.
As you can see from the targets I started grouping well, then lost it on the
second attempt. On the last target I was able to relax a little more and
groupings improved. I haven't done much shooting this year and it shows. Seem
to have a tendency to pull left when I squeeze the trigger. The target black
dot is 3/4 inch, circles are 1 inch, 2 inch, 3 inch, and 4 inch. Makes it easier
visually to see grouping sizes without measuring.
The next thing to do is lap the barrel. What you see in the pictures above
is the result of buttoning only, I cleaned out the lubricant and shot
as is, unfinished. Hoping to make a bullet mold to try with this barrel and
do some 50 yards groupings. Hoping for at least 2" groups at 50 yards.
Rather then me writing a long paragraph about
button rifling, I have
attached the link below on a really well written article about rifle barrels.