I wasn't knocking your findings, or anyone else's on this thread one bit.
Federal brass is notoriously ''soft'' and I don't use it in rifles that require loads close or slightly over maximum, unless they have custom reamed, minimum spec chamber dimensions and even then, I only neck size.
I use the Federal GM Match brass for an Antonio Zoli 30-06 I have exclusively, simply because there was zero visible or measurable stretch on the cases or even a sign of an expansion type pressure ring, after the first firing.
In truth, all of the Federal brass I have has come from estate sales for the GM and the rest has come from range buckets.
I'm to cheap to throw it away and seeing as I know it's on the soft side, load it accordingly and keep it in boxes marked for specific firearms.
The nice thing about helping to maintain our range, is that I also empty the brass buckets, mostly 22rf and surplus 7.62x39, where I find quite a bit of once fired brass, for everything from 17/223 right up to the very odd 458 WM.
I give the unusable brass to a friend that does a fair bit of lost wax casting of belt buckles and other artsy fartsy stuff. The surplus just goes into one of the local metal bins and the reusable stuff goes home.
I'm never going to run out of brass for at least 25 different cartridges.
I have a 303Brit, unit match rifle that absolutely loves the old Federal Gray Box 174 grain, factory loads. This rifle has a tight chamber for an issue 303 No4 MkI Long Branch, I would almost say it's chamber was reamed with a custom reamer.
I've been through this before with a lot of folks who really dislike Federal cases for reloading.
Most of them insist on full length resizing, because they've read somewhere than neck sizing only can and will cause bolts not to close on the case in the chamber under field conditions. Can't change their minds or educate them on learning what their reloads should be tailored to for their particular firearms.
I know you are well versed in reloading and can understand where you're coming from, especially with max or near max loads.
I have firearms that work well with Federal cases, including a very accurate Tikka T3X chambered for the 223Rem and a great little Husky 8x57 loaded with 196 Norma Oryx bullets that I purchased from you.
I've got five reloads on 40 Federal Blue Box cases for that rifle and none of the primer pockets are loose and they've been neck sized only. 56.0 grains of H414sl10 over CCI 250, under 196 grain Oryx give me 2600fps. Not a light load but not maximum either.