HaroldNRAEndowment
Well-Known Member
Expanding on response from Lyle2231, there used to be, 20-30 years ago, quite a large amount of published data about using a filler to take up space. They used the term fiber-fill(pillow stuffing) which is a fluffy polyester. One thing to note, for accuracy, one has to make a trial with one cartridge to determine how much to use. Then remove it and make sure there is no powder embedded in it. Then with a precision scale measure the weight of the fiber-fill, for this is part of the mass being pushed out the barrel. Then work on tearing out pieces of the fiber-fill from the source to match weights of balls of the fiberfill. Once the weight is determined, keep in mind the load data is based on a specific bullet mass. Having an effective larger mass being pushed down the barrel, be aware the load data will actually be based on a lighter mass being pushed out the barrel.
The subject is both accuracy and safety.
Best Regards
The subject is both accuracy and safety.
Best Regards