I had read that my Saiga 223 wouldn't like anything 70 gr or above, but I wasn't clear on whether or not it caused keyholeing or if it was just bad for my gun or such. If its just a keyhole problem, would the close combat of a uninvited midnight house-guest with a finer taste for MY things make excellent use of 75 gr BTHP Hornady T2 Tap? If it will work for my rifle, whats the max distance I could expect before the shot goes all cattywompus on me? Any other unknowns (for me, that seems to be a lot with my new Saiga) I should be aware of with a heavy load?