Has anyone here experimented with or heard of anyone else experimenting with using solvent to bind small charges to the base of the cavity in the casing instead of using a filler material?
I was reading some information about Finnish and Russian ammo of the WWI-WWII era and found commentary on several sites saying that it was common to spray acetone into the charged casings with a perfume sprayer type device. What it would do is dissolve some of the nitrocellulose in the powder and stick it together in a loose clump and glue it a bit to the casing. It served to hold the small charge in place against the primer in a uniform manner. The same way some people use fiber fill or cornmeal filler to do the same... but the bound powder burns completely and won't leave debris in a suppressor like filler materials do. (That's my major problem with using filler, it makes hard clumps of gunk in my suppressor).
Here's a link to one of the sites I found it on. Search the page for "solvent" to find it unless you have some time to read. http://guns.connect.fi/gow/arcane3.html