Light Primer Strikes or tough primers?

[KestrelBike]

So these are all happening with two types of ammo from one order from Freedom Munitions.

#1 300 AAC (.300 Blackout) 150gr Hornady FMJ remanufacturers [500 rnds]
#2 300 AAC (.300 Blackout) 208gr A-Max remanufacturers [250 rnds]

These were ordered online back at the end of May 2015, when there was a bit of a rush going on and my order got a little wonky- apparently the first order was stolen at some point between their factory doors and the UPS truck picking it up.

Anyways, I have two .300Blk weapons: A Rem 700, stock but for a Timney 510 trigger that I didn't alter beyond installing it. And then a .300Blk AR-15 that I put together. With the Remington, I'm averaging about 6-7 light primer strikes per box of 50 (both the 208gr and the 150gr), which obviously sucks. However, when I go put those light strike'd rounds in the .300blk AR, they still don't fire. I did a 3-gun match with my .300Blk AR and I think I only had 1 FTF, so I have to think that the problem is not the ammo, but my Rem 700's Timney trigger not giving the firing pin enough oomph to get the job done... but I scratch my head wondering why the AR can assumedly fire fresh rounds just fine, but can't finish the job if they've been dimpled by a light strike in the Remington.

I've read that places like FM source their primers from wherever they can get them, so could this batch of ammo have used primers that are particularly tough? Should I contact Timney and see what I should do about getting light strikes? (I've also read that some people contacted them and were sent a different sear spring which apparently cleared things up).

The red-encircled rounds did not fire, all other brass fired. There is a visible difference in the dimples between the fired ammo and the "light strike" primers, but I'd think that ever those primer strikes should have been enough to fire the rounds.



I suppose a test that I can do is just put the stock Remington trigger back in and go through another box. Unfortunately, .300blk isn't getting any cheaper, and FM is clear sold out for the time being (except for some expensive $0.80/rd stuff)

ETA: If it turned out that the boxes I used in the 3-gun match were miraculously good and the rest of the batch has genuine duds, 7/50 is not really acceptable and at that point I'd be complaining to Freedom Munitions. So perhaps a better test would be to pull the bullets from the duds I have (earlier on, I just tossed the first 6 from a box that didn't fire), remove the powder, then put the brass in a vice and try to detonate the primer with a nail and hammer.