Are these light primer strikes?

[futurerider103]

I just got my .308 build completed and I went to sight it in and these are the first 3 rounds. I didn't try to shoot anymore because to me they looked like good primer strikes.
I did install a SSS Competition trigger and when no round is in it fires good and hard but when a round is in it it feels like the firing pin just doesn't move fast enough and I can feel what feels like something making 2 movements and it feels like it fired very weak. Sorry for the bad description but that's what it is to me.

I just looked at my Savage 110 in .270 and 30-06 and when the gun is cocked and I pull the trigger the bolt moves forward ever so much. On my .308 the bolt doesn't move forward it just rotates counter clockwise a tiny bit

 

[WestKentucky]

Looks like it was definately a weak shot, not necessarily a weak pin strike. The photo is a bit too dark to tell much but the primer looks like it took a solid hit but didn't get driven back to flatten back out. The one on the right looks fine but the others look questionable. Try more pics in better light. Compare to known good rounds in any caliber that are not from that rifle.

 

[herrwalther]

Those are definitely light primer strikes. The problem is likely two pronged. From the looks of it you were shooting steel cased ammo? Steel cased typically have harder primers which could pose a problem for some firing pins.

 

[futurerider103]

My dad put those rounds in it and it fired just fine in 2 of them we didn't try the third. I think it may be hard primers although I tried to fire the first round 4 times by cocking and firing

 

[fguffey]

Are these light primer strikes?

I will assume the primers were dented but the ammo did not fire.

Yes the dents are light primer strikes, the primer should be crushed. I have killer firing pins with strong springs. My primers are crushed before the bullet, case and powder know there little buddy, the primer, has been hit.

When the case fires the pressure inside the primer causes the dent to conform to the firing pin, to do that the sprig must be strong to hold the firing pin and prevent it from being pushed back by the pressure, it is a .7854 thing.

F. Guffey

 

[fguffey]

I just got my .308 build completed

I do not know who competed the build, I would have determined the length of the chamber from the shoulder to the bolt face first, I would not assume the case would chamber with the extractor in the case groove on push feed and or control feed.

F. Guffey

 

[fguffey]

On my .308 the bolt doesn't move forward it just rotates counter clockwise a tiny bit

I am not confused, the firing pin goes forward, the spring that pushes the firing pin forward pushed the bolt back, if the bolt can move back. there are rifles that have bolts with exposed firing pins at the rear, I would be concerned it the exposed firing pin/cocking piece moved ever so slightly.

F. Guffey

 

[Sun Tzu warrior]

Has the barrel been properly head spaced?
Seems to me that excessive head space would cause primer strikes like that.
STW

 

[futurerider103]

It has been properly headspaced.
When I took the pics the rounds hadn't been fired yet. My dad grabbed the 3 rounds and the 2 eons he tried to fire fired on the first trigger pull. I ejected the case and the firing pin dimple in the primer looks normal. We didn't try the third round. I think this may be a case of hard primers in cheap steel ammo