As I was shooting today, I noticed as I worked up in my load that this rifle was swallowing everything with no problems. Then when I hit my final group shoot, I stepped up another half grain ( 7mm-08-- 140gr. sierra spitz. with H4350 48grains.) After the first shot I broke down the action and the case stuck in the chamber. I worked it a couple times and nothing. I ended up using my cleaning rod to push it out. No problem. Well I shot the second and it ejected fine. I went on and shot 4 more and all ejected nicely. I shot a total of 6 shots with this load. After putting my rifle away I went to inspect my brass. Upon inspection I noticed that the last 6 shots talked about above had that burnished spot or light scratched spot on the case head. I know in my bolt actions that this would be a sign of to much pressure and need to back down. I am wanting to know is this sign the same in a single shot? By the way that was the max load listed in the manuals for that powder/bullet combination from the 7mm-08.
Last question, could this have damaged anything? My barrel, chamber etc.??? I seen none . When something like this does call damage, is it something you will know when it has happened? I mean you won't shoot for year with a stress crack in barrel or chamber and then gun blow up one day will you? thanks for the help.

I shoot mainly single shots and that is a sign of too much pressure. I'd say you've hit your maximum powder charge for your load. I had a browning 1885 single shot in a 270. It would leave ejection marks and flatten primers, but the same load in my Ruger #1 had none of the effects. It could be you have maxed out your load or the Nef rifle has less tolerance for that much pressure. It didn't hurt your rifle, but if your sticking cases then I'd back off the powder charge. I really doubt you could cause enough pressure in that chamber to stress crack short of plugging the muzzle with something.

I love my handi rifle in .223. It shoots all day long inside an inch. Great little shooter as I'm sure your 7-08 is. 48 gr of H4350 does sound a bit hot and is evident in the description of your brass. If I were you, I'd back it down a notch. My browning Micro hunter 7-08 loves 150 gr spcl bullets from Cabelas pushed by 46 gr of IMR4350 which is also a max load. Both IMR4350 and H4350 although not interchangeable have very similar burn rates.
Drop down a grain or two. A critter will never know the difference. And to extend your brass life, if this is your only 7-08, just back your sizing die out a bit and neck size your brass. This should improve your groups too.