The one issue with 5.56 in a handi rifle is the harder primers. You will almost absolutely have to install a heavier hammer spring. I have some Malaysian 5.56 and it often won't fire in the handi. I have heard the same about the Rossi single shots.
As far as your concerns about pressures, the Handi handles all sorts of calibers on the same frame and barrel blank. Many of those push 65k or so. I don't worry about any difference in 223/556.
200
100 or so
100-300 USD
H&R and I believe Rossi have single shot rifles with interchangible barrels.
Rossi is coming close with a single shot rifle ( the wizard) with interchangable barrels. They boast 21 different combos and include shotguns. As far as a gun that can shoot everything from a 17 HMR to a 50 caliber bullet the answer is no.
22 Long Rifle
Single shot break action? yes.
from my personal experience from that type of rifle id say around 40 to 60 dollars
if you dont know that then you should not own it.... the barrel should break over and you load it there
it should shoot 1inch or better three shot group at 100 yards. try different bullet weights.
Best left to a gunsmith
No