I found data in my book for Lil Gun with 30 Carbine, should work great. I am showing loads with LIL Gun the same as with H 110 at 15.0 grs with 110 gr. bullets 2106 fps with H 110, and 2064 with Lil Gun. The pressure with H 110 is 36,000 cup...with Lil Gun it is 29,800...big difference in recoil, the Lil Gun would be a lot more pleasant to shoot. These were loads in a 20" barrel. It lists 100 gr bullets with 15 gs Lil Gun @2132 fps, and dosent list Little gun for 85 gr bullets but has H 110 with 17.5 grs @ 2458. So, I am sure you can start with the 15 grs with the 90 gr bullets and work your way up to 17.0 and be getting about 22-2300 fps.