Here at BS acres we shoot lots and lots of cast 22's for fun and in persuit of small edible creatures. The component cost of most loads is about equal for primer, powder and gas check. Cost for the boolit is so small I wont even count it.
What I hoped for was a load that would equal the 22 wmr for as cheap as possible. By eliminating the gas check I would reduce cost by 1/3.
What I found out answers some questions I regulerly see posted here and also raises a couple new ones. I decieded to do a test with an iron sighted 22 hornet.
These type of loads will be used for ranges less than 100 yards so this rifle was fine for the test. The primer used is not the most accurate for the load but worked OK and we have an abundent supply.
One powder I have found to be well suited to the hornet and cast is Alliant Steel. The load tested was with the NEI #2 cast in ww at 625F quenched at .226" and speed green lube, 5gn Alliant Steel, and a CCI small pistal mag primer. The load shoots better with Rem 71/2 srbr but I wanted to save my dwindling supply. Average muzzle velocity was right at 1800 fps
I shot each one three times and each time the load without checks averaged better than with checks.
In this case thats the way it worked out, not to say thats always the way it will be. So will gas check designs shoot good without a check? In this case yes. Can a boolit without a check equal velocity of a checked one? In this case yes. I also often see advice given that PB boolits are restricted to BP velocities, in this case not.
This makes me wonder what is the breaking point in velocity at which the gas check will make a differance. I plan to God willing continue this test to see just how fast a w/o can go and still equal the accuracy of its checked twin. Not that I think I need more speed quite the contrary I am quite satisfied with a 48gn flat nose boolit doing 1800 fps for small game and plinking. But it has just got me curious to know just when I realy have to add that extra 1.5 cent per load.
Through out this shooting I could detect no differance in barrel condition between with and w/o loads. There was no leading at this velocity with eather. So I guess more fun is yet to come and at least with this rifle and boolit I will have some deffinite answers to questions I often see asked here.
BIC/BS