I will be buying a mold for a 30-06 boolit for deer soon and I think I have settled on the arsenal version of the ranch dog with tumble lube grooves: http://arsenalmolds.com/products?product_id=107
As I was poking around their site, I noticed this mold could be ordered gas checked, plain base, or 50/50. Given the pressures involved with a 30-06 hunting load I would think gas checks would be a necessity. What would a plain base boolit be useful for? Messing around with checks costs money and is a pain, so if there is a use for a plain base in this application, I am all ears.