The extra 2" of barrel accounts for 100-150fps MAX. The data you have from Barnes for that very bullet (coating and all) shows a max load of 31 grains of H335 at 3925fps, but you think that you're getting 4100fps+ out of 30 grains. And ballistic charts are not the gospel either.
According to the Barnes manual their max load for their 40gr VLC is 31gr of H335 at 3932fps with a 24" barrel. My 700 has a 26" Heavy barrel and I use magnum primers which is recommended for this powder by my Speer manual.
So you're using a magnum primer as recommended by one manual, with the data from another manual that doesn't use a magnum primer. What is the MAX load listed in the Speer manual for a 40gr bullet with a CCI magnum primer? I'd bet it's less than 31 grains.
If so, you're setting yourself up for pressure excursions.
The coated bullets I use are capable of higher velocities with lower pressures.
As stated above, the data for the coated VLC bullet shows a max velocity of 3932fps. The coating is already factored into that data, which means that you are probably over MAX if you are really getting 4100fps+.
My 700 action is more than strong enough to handle a 40gr coated bullet with as much H335 as I can stuff in the case.
Well, if that's not the most reckless and ignorant statement I've ever heard, I can't remember what is! I watched a guy, sitting at the bench next to mine at the range, shooting an M700 BDL .223Rem, have a case rupture because he was shooting "misc. handloads." He was lucky that he didn't get a face full of hot gas and metal, but fortunately the rupture only blew the ammo, magazine, follower and floorplate CLEAN OFF THE RIFLE! He was lucky. Do you feel lucky?
Why would I want to go to a 22-250 or 220 swift when I can get similar velocities out of my .223 with less powder and cheaper brass?
One word:
SAFETY!!
Oh, and I do have the latest editions of both the Hornady Manual and Speer manual.