Correct me if I’m wrong, but a 1/16” movement of a 42” barrel will move the poi about 7.2” at 100 yds and a 1/32” movement will move it 3.8”. Even on cross sticks I’m not that steady. This would be in perfect conditions with no wind. I have a couple of cloverleaf targets hanging on my wall, but I don’t talk about the other hundreds.
Been there done that
One of the additional factors that exist when going from a tight grouping at 50 yards to an open pattern at 100 yards is the effect of the ball's velocity as the velocity drops from above the speed of sound to below the speed of sound. Most balls start off with a velocity above the speed of sound. At 50 yards, the ball is still travelling above the speed of sound. By 100 yards, the velocity drops below the speed of sound and the ball has transitioned from smooth flight through a turbulent region adding a random factor to the trajectory. Either the ball needs to be travelling above the speed of sound at 100 yards or below the speed of sound the entire flight. That all the other factors will have an impact on the group at 100 yards.
I think the building is now a herbal business. There is another Montana Rifle Barrel Co. operating in the area, but a different owner and location, specializing in modern barrels. I think they make them mostly for Remington.I'm surprised more people don't use a slower twist for round balls.I realize every barrel can be different.Tighter twists work well for conicals.I still use a montana rifle barrel from the MRBC on my .54 JBMR.35" long barrel.1 in 72" twist with my round balls.Thin silver blade front site.Used to target shoot it a lot at local shoots.
Sort of wish I would of kept the 30" barrel it came with as it had the serial number on the barrel yet,but I did'nt need it so I sold it.
I've had this gun since the early 1980's.Killed tons of deer with it.
Shot very well if I remember correctly at 50 yards.100 yards were a bit wider though but most in the black yet.I spit patch wiped in between shots with long underwear patches.If I did'nt it would throw a flyer now and then.Used .52 or tighter fitting .530 balls with lubed pillow ticking patch with usually 80 grains of FF.
I hav'nt needed to replace any parts on this gun,but showed through my research where the parts could be yet.
Some days the planets align and we shoot way better than we usually do. Some days we leave the range like "I'm not even sure what happened, I basically just came here to make noise"
Treeman…I’ve been round balling for 50 years…I can testify that precision shooting is limited by our gunsights…open sights at 100yds is usually a 2-4 inch affair in ideal conditions…use precision peep sights 1-2 and a half inch groups…Benchrest shooters use 36x to minimize the micro sighting errors, heat maragé and sunlight trickery…
I usually do better with big white FBI Q-Targets because the white color brings the sight picture out and theres no distraction of a "bullseye" , you just hold at Center Mass and squeeze
Great though, I hadn't considered trans-sonic disruption with a ball but am very familiar with it in Mid and Long range bullet flight.
I'd lower the powder charge or shoot conicals.
Nice! I've come to the conclusion that my ability lies (no pun intended
) in the 50 to 60 metre range at best. I won't shoot an animal past this, and as my club's range is set for the usual 25, 50, 75, 100 etc, I very rarely venture beyond 50 metres when shooting paper. I too read about those close groups at the longer distances, made with standard production rifles and open sights; in the early stages, I used to feel inadequate, but am now reconciled to factual events.
