Question regarding the gas checks, Do you need them below 2000fps?
Thanks,
Jerod
Mike Venturino says gas-checked cast bullets are usually if not always more accurate than plain based cast at any speeds. I prefer to use gas checks when possible even for the 38 special. No they may not be absolutely necessary but I've got better accuracy and a cleaner barrel with them installed. In the 45-70 I can get good accuracy with lyman # 457193 405gr to about 1600fps or so and then things start going south, but it's a microgroove marlin. Gas-checked cast bullets could no doubt be ran faster. In the 308 win I can run gas-checked bullets at 2750fps no problems.
