I’ve been using one of these for about 4 years, and found it to be OK on the whole. One niggle is that the rail that you rest your rifle on can be a bit wobbly.
Lockdown provided the time to fiddle with the chair and some cut off bits of metal in a friends barn. After a lot of measuring and sizing. We took the plunge with some off cuts of roofing struts.
In short. 50cm is the best length with the top and bottom three pre-drilled holes additionally drilled out to 8mm. The final touches were rounding off the sharp edges with an angle grinder and two coats of BBQ paint from a can I had left over on the garage.
the rail is now rock (and I mean rock) solid.
Lockdown provided the time to fiddle with the chair and some cut off bits of metal in a friends barn. After a lot of measuring and sizing. We took the plunge with some off cuts of roofing struts.
In short. 50cm is the best length with the top and bottom three pre-drilled holes additionally drilled out to 8mm. The final touches were rounding off the sharp edges with an angle grinder and two coats of BBQ paint from a can I had left over on the garage.
the rail is now rock (and I mean rock) solid.