OK NoMercy let me see if I got this straight. You're saying that the bore/groove diameter of my 350L and my Ruger Blackhawk 357 mag are the same?
If that's the case than I should have zero issues with my .356" sized Speer Hot Cor bullets. I noticed that with freshly resized brass and after seating the .356" bullets the brass exhibits a slight bulge down to the bottom of the bullet. My seating depth is .020" longer than factory ammo but chambers easily in my Axis.
BTW if you want ever buy a Savage Axis or Edge and want a sweet trigger for about $25 get the MCarbo pro trigger kit. This kit replaces the heavy factory trigger spring and shims for either side of the trigger to prevent the side to side wobble and a stainless steel set screw. Trigger pull went from a 5-6 lb trigger to about 2.5-3 lb. Super sweet and only about a 10 min job.

.350 Legend shares the same bore and groove spec as 357/38, the same as 9mm parabellum as well, for that matter.

Thanks Nomercy. One more question now that I know I will have no issues with it in my Axis. But how about my AR? Will the slightly higher pressure effect my cycling much like using a hotter load? It seems that the designers used a differently shaped bullet for the reason you mentioned earlier to reduce the bearing surface. The Speer Hot Cors I am using are very similar to the ones in the factory ammo. I would imagine that using a standard .357 pistol bullet would alter the cycle pressure too causing the buffer/spring to take more of a pounding than necessary.

Not at all - AR’s aren’t blowback operated, so max pressure seldom matters for reciprocating speed - only port pressure and flow.

We’re not targeting a narrow +/-50psi pressure band for port pressure - we have the luxury of a wide tolerance for port pressure and dwell time. The case is small, and the pressure curve drops off relatively swiftly. Even running a pistol length gas system, the “throttling” of gas by the gas port diameter significantly limits the operating pressure exposed to the carrier.

The difference between two bullets in this case will yield FAR less difference in port pressure than changing bullet weight or changing powder type, for that matter.

So when we use a revolver type bullet, or a copper solid with a long bearing surface (high bore drag), we end up hitting our max pressure earlier in load workup, meaning a lower charge weight hits the same max pressure - which invariably reduces our port pressure later down the bore.

You can actually see the counterintuitive response in several cases - another example is running a fast powder which will hit a high pressure max early, aka, lower charge weight, earlier than a slower powder which would yield a higher port pressure after the same max peak. So we consider that charge weight as “max”, but then the charge weight is low enough such the pressure won’t be sufficiently sustained downbore, and the curve has subsided too much by the time it reaches the port and it doesn’t have the oomph left to cycle the action.

Thanks...I can't wait to try out my reloads in the Axis.

For giggles I picked up some .357 140 ftx just to try. The winchester loaded boxes (both 150 and 180) says .357 for the bullet diameter. Loaded them on top of lil gun (24 grains). They shot and loaded really well, and shott less than .5 at 50. the trick is not to run the brass threw the resizer and it loads like a champ. Note: I used winchester brass, other brass might vary in thickness. I'm going to try the 158 next

apon futher testing the 357 bullets work well with my encore (358 loads good to, haven't shot them yet) ruger american and it's a 50-50 deal with the savage. the savage might be a deal with a really tight headspace, so I have more experimenting to do

I have a question on bore snakes for the 350 Legend. I have two new rifles. A Ruger Ranch and a Savage Axis 1 with no accutrigger. I'll put the MCCarbo pro kit in shortly.
My Question is I have a Hoppes Bore snake brand new (24018D) that is for .35 - .375 Caliber. I'd be curious on your thoughts on whether this would be appropriate. I know most are saying to use a .357 or 9mm but I'd like an opinion from someone who uses them on their 350L. Since the bullet is a .355 I'm thinking it may be ok.

New to the board so thanks you for your comment in advance.

The bore for the .350 Legend is the same groove and bore diameter as any .357mag on the market.

A brush spec’d for .35-.375” bores might be very tight in a 35cal bore, regardless of whether that’s a Legend or not. Might take a few passes to break the brush down enough for smoother, easier pulls.

This is what I was wondering. I sold my 35 Rem Marlin and had this lying around. Probably best to buy the 357.
Thanks for your response