i read the article to be found at the link below. this article indicates that an alternative for a MMP sub-base is the gas seal trimmed off of a 28 gauge shotshell wad. the cost savings here is unbelievable. 500 shotshell wads cost $9.00. 500 sub-bases from MMP cost $77.50. however, i measured a shotshell wad base and it is 0.533. the sabot measures 0.503. the bore in my rifle is 0.505. it seems like compressing the 0.533 wad down into a 0.505 bore may be something which will increase pressure levels.....maybe to a dangerous level, maybe not....i do not know. for that matter, i don't know for sure that it will increase pressure at all.

do any of you have any experience using the shotshell bases as suggested in the article linked below? the only real reason for doing this is economics, but it really one helluva savings if it works. please advise.

http://www.gunweek.com/2004/feature0610.html

welll...I'm not a big Toby Bridges fan, but we black powder silhouette cartridge rifle shooters have the poly-wads in about 4 thicknesses to choose from at $21.00 per thousand, shipping included. What caliber are you shooting?

Rich
DRSS
Knowledge not share is knowledge lost...

Bill just my opinion here, but I don't think that .533" soft plastic gas seal will cause much more pressure than the .503" one that bumps up at ignition and expands until stopped by groove dia, the .533 one will be groove dia at loading, but would bet it may be hard and slow to load being that much oversized. It would seem to me that .533" should be a pretty good fit for most 54 cal guns.

swheeler - i think yuo're right. they seem more suited to .54 cal. oh well, just a thought.

idaho - i shoot a .50 cal. i think i shoot it too much too. it is becoming a real past time with me.