N/A .177 for slugs (primarily at least)?!

Hmm boat tail 177 slugs those are different.
I got them from @mercado he's got them from griffin, I guess he still has the dies for these but doesn't sell them on the market. They fly great though!
I've looked at manny chambers that appear to have no throat at all. I don't know what the ultimate degree would be. We will know more as custom jobs are finished and results reported. Keep us in the loop please when finished and you are satisfied ot not on your project. Many thanks.
I will take a picture of the chamber today before I drop it off.
 
I've looked at manny chambers that appear to have no throat at all. I don't know what the ultimate degree would be. We will know more as custom jobs are finished and results reported. Keep us in the loop please when finished and you are satisfied ot not on your project. Many thanks.
This is what I got so far, I also slugged the barrel and the drives seem to be somewhere between .176 and .1765. The slugged slugs were .177 16gr griffins and you can see the groves are more pronounce on some, rather than all of them.

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I just checked again slugging with 178 varmint knockers and the lands are .175 and groves are .176.

Also I figure out the reason for less contact on one side of the grooves is due to how I'm pushing with the rod, not the barrel itself.

I'm conflicted on where or not I should take it to get the throat opened up, it's not hacking the slugs or removing any material. I trust my guy to make the throat but I would regret it if it change the accuracy negatively.

 
I’m not sure I would touch that. Why fix what isn’t broke?

and the springs made it here yesterday
Great to hear! Yeah my thoughts are the same. I will still go to the shop.Show him the barrel and show him the slugs and see if he thinks it's worth doing or not. Given that we go way back, it's not like he's making much money off of doing it, so it wouldn't skew his judgment.