I have 2 youth rifles in 243 Winchester. One is Remington 700 youth. The other is T/C Venture compact. Both have 20" barrels and are less than a year old. Accuracy with every load tried is averaging from 3/4 inch to 1 1/2 inch at 100 yards. No complaint there.
In working up deer hunting loads for these rifles I am getting very low velocities compared to published data. I am loading 1/2 gr under max published data. I am working up loads for 95 sst and 100 sp Hornady bullets using H4831sc, imr4064, and imr4350. The chronograph velocities are running 200 fps to 300 fps lower than published data by Hodgdon and Lyman. The highest fps is 2705 using H4831sc with 95 SST bullet. Both rifles are giving fps readings within 25 fps of each other. I realize that I am shooting out of 20" instead of 24" bbls. What is your experience with 20 bbl velocity?
