I just ordered some 25 grain .22 bullets and a manual from JRP Custom Bullets in Whitehall NY. after reading an article on them in Rifle Shooter magazine. Out of a regular Hornet (not a K) they were getting 3900+ fps. He is working on a 19 grain bullet that they tested at 4000+ fps and expects to have it ready for sale in a month or so. Cost for the bullets was $20.00 per hundred Moly-coated. I can't imagine .22 Swift velocities out of a Hornet.