According to my Barnes Ballistic Program the 20 gr V-Max with a BC of .187 leaving the muzzle at 4000 fps is going 3420 fps at 100,2910 at 200 and 2450 at 300 yards.One thing to consider is the rotational speed of the bullet.That does not slow down much and the bullets explode even at the lower velocity.Wind drift with a 15 mph wind is 1.6 at 100,6.8 at 200 and 16.6 at 300.According to my old Ackley book of wildcats this cartridge is capable of velocities of over 4400 fps.Old P.O. could be a littleover on his estimations sometimes. My loads are pretty conservitive considering all the data is for obsolete powders that are no longer avaiable.The 25 gr Hornady HP fares a little better, but not much.Best shooting I did was with my Remington CDL 264 mag but thats a bit costly to shoot alot.Did way better in the wind.The 17 calibers are like everything else in the world.It has it's limitations.Velocity loss is closer to 500 fps evey hundred yards 562 at 100 509 at 200 and 458 at 300 for each 100 yards.