Argentine action stepped barrel DPCD style. Boyd's stock. Took a lot out to fit the bolt. The barrel channel is open on the left but tight on the right, I'll keep sanding. The bottom metal is rounded therefore the stock needed to be radiused to allow fit of front metal screw area. The action when placed in the stock rocks a small bit prior to installing screws, does this matter? Should it be a snug fit no rocking or when attaching the bottom metal via screws, the rocking disappears. I don't want to cause myself accuracy issues prior to shooting. Any guidance appreciated. Thanks in advance.

pillar bed it....

Rocking front to rear I assume, since the receiver is round. Inlet it so it does not rock, and then glass bed it, making sure it is not bent when you tighten the screws. As for the barrel having the stock touch on one side and free on the other is bad.
Spot and shave.

The rock is front to rear. What is the pro method of finding where the contact is? And is it appropriate to use a sharp chisel to shave the flat areas of the stock? Or what method do you like? Thank you.

Inletting black is the only way. Brownells sells it. Yes, we use small chisels for stock inletting, as well as scrapers and barrel inletting tools for round areas.
If you aren't comfortable doing it, send it to someone who is. Although you have to start somewhere.
Use Acraglas gel.
Make sure where the metal is touching; that is what the inletting black is for.

Thanks, and what tool do you typically use on the barrel channel? When working an inletted stock such as Boyd’s.

Dave Wesbrook's book shouuld be a must read for the beginner..BEFORE ...way before attempting any inletting

There are other good tutorials out there, but Dave's book expressly addresses the issues with a semi inlet

Gunline. Get from Brownells. And you can replace the little washers that actually do the cutting.

Three words; Headless Inletting Screws.

Yes! Yes! Not using inletting screws for proper alignment can lead to cocking of the action, improper bottom metal to action fit and other problems. Eyeball it from the rear to see if it is level in the stock.

When you think you have all the "rock" out of it, with inletting black install barreled action with front action screw. I usually go around 35 inch pounds. If you don't have a dial indicator set up, just make a small wood shim. with front action screw tight, lightly push shim under barrel at front of forearm. Now tighten rear screw. 20-25 inch pounds. doesn't have to be as tight as front. if barrel moves shim will loosen. You still have a little work to do. give it a light tap in front of receiver while screwed in and hope you get some marks.

Helpful, thanks!