If you mean Solids as in Steel Jacket / Lead core Woodleigh's,
Merkels are fine with them.

I have fired quite a few through my 375 and 470.

If you mean solid Brass ala Barnes X's, no I haven't and
I wouldn't.

Generally in the DR world, Solid means a Steel Jacket / Lead core
Bullet. Barnes X's etc etc should be referred to as Monometal.

500 Nitro