BTW, you can actually get "blow back" from worn steel back stops and I have managed to get "hit" unexpectedly from bullets coming back from the back stop. (Now, I really detest indoor shooting ranges....).At a guess, it is an indoor range and their concern isn't that it isn't a name brand, but rather that it may have steel in its projectiles. Tulammo is a Russian brand and Russian ammo has a reputation that indoor ranges don't particularly like.