Want your front rest sand bag to keep its shape?

These bag trainers are the benchrite original square sided with built in bubble level.

These help to keep you front rest sandbag shape, between matches and during transport. 

This bag trainer has square sides without any taper, designed to match the rifle stock forend, without clamping over the stock fore-end, which some rules mandate. 

This will help keep the shape your front bag to hold your fore-end snugly in the bags but still allow smooth recoil.