Over the years I've had several Hornets rebarrelled, and few of them shot as well as rechambered Springfields or original Winchesters. The culprit seems to have been reamers. Take care to see that your new chamber accurately conforms to exact, original specs. The most accurate Hornets I've encountered are Winchester Model 54's. None of my earlier rifles will chamber a neck-sized case that fits easily in a Ruger Hornet. I admit to being off topic here, but hoped it might be helpful.

Bill Ferguson