The old man shot a 257 about the last 15 years he hunted. 100 grain Hornady interlock over 4350 for ( IMR, H and Accurate) . Depending on the brand of powder the speed was 2950 to 3050 fps. As all were below max I loaded whatever was on hand and let it run. All three brands of 4350 hit within an inch of each other at 200 yards. He shot 25 to 30 deer with that load before he hung up his guns do to failing eyesight. The wife and I run the same bullet out of our 250 Savage at 2850. No deer has ever walked away. I can relate to the 257 Roberts. Not to any cartridge called Bob. Also I load bullets in my guns. Have no idea what a boolit is. Sad part is some people actually think that is the correct spelling if the bullets are cast.