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Palmetto-Pride, Have you checked to see if you get the "ejector dimple" if you extract an unfired round from the chamber? If so, maybe your ejector spring is somehow "too strong" or the ejector rod is either too long or binding in some manner as the bolt is closing on the cartridge. Have you...

Mistwolf, I stand corrected. I went back and re-read OP's post. As you say, He did state that the bore was "distorted" under the stamping. As said in my previous post, I can understand how the bore could be made "Oval", Out-of-Round, or as you both call it, "distorted". Somehow, I...

OR: You could just reload your own, and shoot three custom designed ACCURATE rounds for every single Federal GMM round.

Don't know for certain, but I'd bet a dime to a donut you were never in 'Nam, were you?

Sounds like when it comes to ar type weapons; your LGS don't know come here from sic 'em! If this isn't already worked out, I'd get my money back from this guy, and go to someone who knew his business.

In no way do I understand your comment above! How in the heck did you ever stop shooting it after just 15 rounds??? My grin is just beginning to become a smile after 50 rounds. Don't think my big ten has ever sat down at the table without consuming at least 100 rounds. Even when all I wanted...

The Ma., NJ., CT. compliant model of the S&W M&P10 has a barrel that carries it's diameter/weight all the way to the end of the barrel. It's not a bull barrel by any means. However it closely resembles what Colt calls their HBar barrel. According to the S&W specifications, it weighs exactly...

Wow; This is a new one on me!!! For the life of me (& that's a long time), I can't figure out how you'd be seeing an impression of the barrel stamping inside the bore??? I know the Big Ten barrels aren't the thickest ever made, but my gosh; Think what it would take to literally compress that...

Rainman, As I said, I'm not having good luck with CFE223 in my M&P10. However, I've read of others having superior performance in both their Big Ten and an AR-15. Maybe S&W has been playing around with different sized gas ports??? It might work great in your gun, I just wouldn't recommend you...

What type of ammo are you using when you're getting this "ejector dimple"?

Uh Oh: Exactly how does this warranty differ from the one that already comes from S&W at no added cost? "Now that We've kissed you on the cheek; Please bend over and let us have your sixty-three bucks." "Oh, and we'll even give you a receipt for you money. So that way, in the future, you can...

"Minute of beach ball"; now that's an accuracy description I haven't heard before! I guess if you're hunting barn doors, then it might work-out for ya. I hear the kill zone on a barn door is pretty good sized.

In other words: "If I want to hear my gun go "BANG" once, or maybe twice; & don't really care about hitting anything; just like to split the air molecules with a piece of lead once in a while; then this is the ammo for me?" Let's see, I spent how much to get my Big Ten? Now I'm going to shoot...

Well, how'd it go with the ZQ1 308 ammo thru your Big Ten? Is it a go or a no-go?

My experience with CFE223 & my M&P10 In answer to your question: Yes, I am currently in the process of attempting to use CFE223 to work-up a load for my Big Ten. However, I'm not having much luck so far. Have dropped all the way down to 46.2gr with Win. Brass, WLR Primers, and 165gr Hornady...

I haven't had any problems thru about 260 rounds. However, I'm loading nothing but Hornady bullets to the OAL given in the Hornady manual. I've run less that two boxes of factory loads thru mine so far.

Who's steel case loads are you using? Do the bullets also have steel or "bi-metal" jackets? Don't profess to be an expert, but, I've heard from numerous reliable sources that tests have shown steel or bi-metal jacketed bullets will reduce barrel live by as much as 30 - 50%.

I'm not so sure about that; have you had a chance to check-out the new 308 from Bushmaster and/or Windam Weaponry? They both come in about 1/2 lb lighter than the M&P10 and somehow, they've designed it so that virtually everything is AR-15 based parts; even the barrel nut! The receivers are...

Camo job looks good to me! I like your gun: nice and light; the way she was born to be.

Sounds like you got a good deal on your 10 from Bud's. Congratulations. An occasional mag dump should not hurt your barrel too much. Just remember, as a barrel's temp. goes up, its life expectancy goes down. Running that baby red hot day in and day out will make you need a new barrel much...