ORIGINAL: mustad
Muzzloader season opens for me tomorrow. I'm using a CVA Optima; powerbelt 295 grain copper clad aerotip bullets, 100 grains of pyrodex pellets (2).
I've sighted my gun in at 50 meters (55 yards) since it is most likely that I won't have to shoot that much further than this, if any. It appears that when I shoot at 100 meters (110 yards), my bullet is dropping 3.5 inches. Is that normal? Looking at powerbelts ballistics chart, they show the trajectory to be about 2/3rds of an inch higher at 100 yards than 50 yards. Is this information reliable? Granted I only shot 5 bullets, but the results were pretty consistent.
Thanks,
Please see this chart for your PB:
http://www.powerbeltbullets.com/docs/PBB26inchballistics.pdf
For the PB 295 copper clad using 100g of powder, the trajectory charts show you must be 3.48" high to be dead on at 150. You can drop your ballistics into here and get your drop:
http://www.sav10ml.com/pages/load_data/traj_basic_dat.html
I put in 295g bullet
.168 for BC
1620 for MV
50 yard zero and I get the following:
Range Velocity Energy Drop
0 1620 1719 -1.5
50 1432 1343 0
100 1271 1059-2.8
150 1144 857 -10.9
200 1052 725 -25.7
Give it a try. You are about 3" low at 100 yards with a 50 yard zero. If you drop the following parameters into theballistics calculator:
295g bullet
.168 for BC
1620 for MV
150 yard zero
you get nearly the chart displayed here:
http://www.powerbeltbullets.com/docs/PBB26inchballistics.pdf
for example the chart shows a bullet "drop" of +3.48 inches at 50 yardsin the above chart, but the program gives +3.6 inches high at 50 yards, pretty close, so I am confident of the results I said above. Hope that helps. Chap