HSS Feeds and Speeds

I am drilling a .156 hole in 303 SS. The drill I am using is a solid parabolic drill jobber length. I am drilling at 1000 rpms pecking .25 at a time and 1.675 deep. Carbide Depot said that the recommendations were 20-40 sfm and .006-.01 Feed. I am feeding at .0015 the problem I am having is a very long cycle time and I am wearing after just 30 pieces and then the hole goes oversized. I am using a Lico LNT51 with Fanuc Series 3ti-Model A controls. I was just hoping its something simple that im just not thinking of that would make the drills last much longer.

thank you in advance.

Mike