I have a Protektor rear "bunny ear" bag and 6 or 7 home made bags of different sizes. 3 big ones, 2 small ones, and a couple others. I haven't found a bipod height yet that I can't get real close with different combinations of bags.
If I'm doing a type of shooting where I don't have time for rear bags, I'm probably having a lot of fun anyway.
I am nervous with sand filled bags, so I called around to plastic companies until I found one that dealt with poly (plastic) beads that are about 1/8'' in diameter. Then I took a couple old pairs of jeans to the local sewing shop and had her make up these bags, just square and flat, not packed super full so I can mash them or fluff them back up to adjust height. They work great, and I don't get any sand working through the fabric and also working on my wood rifle stocks.
If I'm doing a type of shooting where I don't have time for rear bags, I'm probably having a lot of fun anyway.
I am nervous with sand filled bags, so I called around to plastic companies until I found one that dealt with poly (plastic) beads that are about 1/8'' in diameter. Then I took a couple old pairs of jeans to the local sewing shop and had her make up these bags, just square and flat, not packed super full so I can mash them or fluff them back up to adjust height. They work great, and I don't get any sand working through the fabric and also working on my wood rifle stocks.