I shoot some 129sst handloads out of my 260. Great load on paper. I have'nt had a chance to test'em out on deer, but I shoot the 200gr sst's out of my 45cal ml and they will wreak havoc on deer. My buddy shoots the sst's out of his 300 short mag. Skynimrod is right, he absolutely obliterates deer with his, lots of damage.