Are you still there, FrankBlack01?
. This is technical passion you see here!
@ Chevota: I must admit my error, the ram's rod is 8 mm, not 7
Measured with my caliper, it's 0.315''. And thanks for the good comments!
Nah, the steel base for the ram didn't fit right away. The TR77 receiver tube has the same pin position as my springers, I compared with the old Trail NP tube, it's not the same. Yes I had to re-drill a threaded hole, was quite easy though, 180 degrees from the existing hole. I put the base in place in the receiver, installed the retaining pin and used a self centering punch to mark the hole position. The steel is not hardened, it was easy to drill and tap. For the plastic cap, I used my Dremel tool with a small carbide cutter, and finished the job with #220 sand paper
. The piston and ram are going to stay as they are, I don't have a firearm license, which, as you sure know, is necessary to have air guns over 500 fps in Canada.
The barrel's bore is one of the nicest among all my rifles. Absolutely no bad machining marks inside, it's very smooth and consistent. Pushing a pellet through the bore is like actuating a linear bearing, no tight or loose spots. I re-crowned it, though, there was a little bur to get rid of, and I gently radiused the barrel's entry, was too ''square'' to my taste. I'm sorry, I haven't been able to take a good pic of the rifling itself. Also the barrel looks about the same size as my others, judging by what I can see at the breach anyway. It's a 15'' inch barrel, unfortunately I haven't had the opportunity to shoot it a lot, but it's promising. I had no troubles grouping in a nickel at 10 yards, and it's not even broken in
. Just can't wait to try it at 20+ yards, especially with that 3-9x40 scope!