Really? Are you referring to the 5.56/.223 ammo comparison? Most civilian .308 hand loads or factory match ammo are way hotter than the military stuff. I'll agree with you that the surefire is tougher and built for war.
Actually, I'm finding mk262, M118 mod 0's, Mk248's are all significantly higher pressure than the civilian loads.
For example, I bought some 223 surplus to originally shoot through the surefire -- Sounded like shit...Got some M193's, some M855's, was literally night and day. I was blown away by the difference.
Same goes with the 7.62/308's...I reload - Hodgdon 4831/varget, 178 amax and you basically have the M118. Most civilian stuff I find off the shelf doesn't compete...I have to specifically get TAP or Custom Hornady to get close...I admit, I haven't tried many of the new 308 loads but, I've been reloading my own for a while and 7.62 vs. 308 once you get into the LR ammo is just semantics because it's the same powder, primer and bullet, just a different case.
If you were buying surplus 7.62 vs off the shelf 308, it completely depends on what you're getting...I've had some very low pressure 308 and some very hot 7.62...But, I'll agree that most of the military surplus 7.62 is lower pressure than commonly available 308.
For the Win-Mag anything you buy off the shelf will not be as hot as the military loads.
We compared the Phantom and the Mk13-SD to the Surefire. What we found was that the TI cans couldn't do rapid follow ups, especially the higher pressure you went. The Surefire, didn't bat an eye...The MK13SD suppressed the best but, the Phantom was the best mid range...However, there were obvious drawbacks...The Phantom couldn't handle the high end mil-spec 300 WM / M118's, it was just as loud as the Surefire and the flash was evident, we also got a dust cloud in the face...But, the Phantom did fantastically with low pressure 300wm, decent 308 and did awesome with 300blk...The MK13 suppressed sound the best but, again, complete loss with follow ups, especially on the hotter stuff and we definitely roofed the can with our 300wm mil-spec ammo...The Surefire on the other hand, didn't roof...I threw some HOT H1000 208 amax down the tube...No flash at all, no pop, 4 follow up shots, no problem....Mag dumped 7.62...5.56, she keeps asking for more...I would never do it with a TI can...That's just nuts...But, that's also the reason I dropped what I dropped for the Socom.
It's just become very clear that most people think a suppressor is a suppressor is a suppressor; that's simply not true. Every suppressor serves a purpose and the Socom's purpose is on a battlefield where as most others are optimal for a bench/range environment. - That's all I'm saying.
At the end of the day I'm glad the OP likes his suppressor but the comparison of the Phantom to the Socom is just apples to oranges.
I'm sold on the YHM. Just had the 338LM can on my 716 shooting Lake city 149gr and it sounded like an air rifle. It will be going on my 300WM. I will be getting the phantom QD M2 for the 716.
I'd look up your loads and ask around.
High pressure 300wm didn't do so hot in the Phantom.