Ruger Gunsite 450 Bushmaster problem

Is it new or did it function fine before? Also can you post a pic of the primers with any indentations from the light striking pin? Spitballing without that information:
Check the firing pin hole in the bolt face,
take it apart, heat it or soak it in a solvent or both to get hardened grease off/out of it, then lightly oil and reassemble and test because who knows how long it was shelved before becoming his,
Is the firing pin damaged in a way that shortened it any in front or back?
Is there something blocking it’s motion somewhere that wasn’t checked?
The bolt body is a system so you have to examine every part of that system.

What about the chamber? Is there any reason it’s sitting a little forward?

Ammo, does the shoulder appear lower allowing the case head to be a bit further away from the firing pin when fired?

There are all sorts of reasons it COULD be doing this.

Disassembling and cleaning the bolt is the tried and true solution to this problem followed by a replacement striker spring. In northern climates grease can become thicker in the cold and cause these problems. If so, that grease needs to be removed and replaced with a small amount of oil.

Another thing to watch for is to make sure the bolt is fully closed before firing. The bolt could be almost closed and upon firing the movement of the striker fully closed the bolt and robs some energy from it causing a light strike.

But yes, we need to know if this is a new gun and came with this problem or if it has started happening later after after getting it.

Charlie1022 said:

I have a friend who is having light primer strikes with his rifle with Hornday ammo. His friend puts it in his gun with no problem. He has cleaned the bolt and it still has the problem. Any thoughts?

Click to expand...

found on web

So literally took it to the range after acquiring the gun last week and it’s super accurate. I shot just over a box of HORNADY Black 250 gr and had one fail to fire. Looks like a light primer strike. Anyone had issues with this? Thanks for any help.

Click to expand...

Sounds like short brass to me. The 450 headspaces off the case mouth. If the extractor doesn't grab the rim, a short case will slide into the chamber too far, out of the reach of the firing pin.

I've had 2 rounds that did this. Open the bolt on a loaded chamber and nothing came out. Had to shake the rifle to get the loaded rounds out of the chamber. Both were from the same box of Hornady factory ammo, confirmed brass length with calipers. Both rounds fired fine though.

Click to expand...

i been reading theres a lot of complaints on loose bolts thus head space issues with that ruger

I would expect this to be more common on a 450 than other rifles, because the cartridge head spaces on the case mouth like a pistol cartridge. The range of fits in common bottle neck cartridges between the ammo and chamber include some interference fits. In a 308 Winchester the range is .004" interference to .013" clearance, and is nearly identical in a .30-'06. In the 450 the range is .000" - .020" clearance.

Click to expand...