just run a reamer into the chamber and you have an AI. If your gunsmith knows what hes doing he will set the barrel back 4 or 5 thousandth then recut the chamber and reheadspace the rifle with a slight crush fit to aid in fireforming the cased. Its a pretty simple process actually.
Have to say it's not as simple as just running a reamer into a chamber. Barrels are usually removed and set back a thread or two so that once the AI chamber is cut standard ammo will also chamber.
You will get more velocity since you case capactiy in increased a certain percentage you will be able to use more powder thus pushing the bullet faster. More powder equals more speed but also more throat erosion.
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Have to say it's not as simple as just running a reamer into a chamber. Barrels are usually removed and set back a thread or two so that once the AI chamber is cut standard ammo will also chamber.
huh? The headspace is essentially the same and the 223 Improved is a larger case so the 223 rem will always chamber. The barrel should be set back but isnt absolutely necessary since the headspace is the same. Like I said the barrel should be set back for a slight crush fit. I dont think I would ever turn off two threads to recut an ackley chamber its just not necessary 4 or 5 thousands then set the headspace with a .001 crush to make sure you get a tight fit in the chamber for fireforming. Yes it is that simple.