Hi Tim:
Results are in. I put two one pound blocks of the firm back to back forming a two inch thickness. The pellet went through the whole thing at 40ft. You'll probably need the extra firm and maybe get the results you want.
Diego
> Hi Tim:
> >
> > I use the plasticine clay from this company:
> >
> >formatting link>> > They ship in 50lb cases for about $67.50 US shipping included.> > You can order it in soft to extra firm. I use the firm for bronze> > sculpture. Nice for detail, but stiff enough to give your hands> > a real work out. I have not "experienced" the extra firm, but> > it might be just what you are looking for. It comes in individually> > wrapped 1lb blocks or I think they will send you one big unwrapped> > 50lb block. Just stack a couple of these on top of each other > > and away you go.> >
> > Diego
> >
> Thanks, that might be exactly what I was looking for, and the kids can
> use it for their art projects too.
>
> I don't suppose you happen to have an airgun handy and could shoot a
> block, just to see how deep it went? A 50 pound block would
> probably work for firearms, but be overkill for an airgun. We're
> looking for something stiff enough to stop a pellet in 1/4 inch to 1/2
> inch depending on power.