No, two different issues. I had your issue with Remington STS's. These are the fatest primers. Ive never had this issue with any others.

Is there any chance the vent liner has eroded to the point that you are experiencing an unusual amount of back pressure?

There are two distinct problems that can occur with the Knight on occasions.

1. the primer backs out of the battery cup and sticks in the nose of the bolt. Oddly enough the primer in a shotgun primer measures .209" - the whole in the face of the bolt of a Knight is .176/.177" and with pressure and heat - especially heat. At times the primer will be heated and pushed out of the batter cup and back into the face of the bolt. Snapping the trigger will push the primer back into the battery cup and then it will fall out of the breech when tipped.

2. The primer, actually, the battery cup expands so much it sticks itself in or on the walls of the primer pocket of the breech plug. This one I hate - when it happens. It is sort of like a shell sticking in the chamber of a CF rifle. Usually because of a dirty chamber or shell. Since CF cases are mostly brass we do not see this problem as often because bras expands to the size of the chamber and then quickly cools and contracts and reduces in size so it can be easily extracted... Shot gun primers or battery cups made of aluminum - not so much!

I have found most often but not always - when the primer pocket gets dirty or sticky the aluminum sticks very well to the walls - especially right at the top of the pocket where the aliminum or even a brass battery pocket can grab the inside lip of edge of the pocket.

So out comes the JB's and I end up trying to clean and smooth out the walls of the primer pocket...

AND THEN... as Josmund suggests... Is there any chance the vent liner has eroded to the point that you are experiencing an unusual amount of back pressure? there is always this problem especially with heavier bullets and charges.

If I remember right, the Winchester 209 primers are the least or lowest on the power scale for 209 primers. This is why I had problems with my Knight Vision and BH209 powder. I had to go to a strong (hotter) power 209 with a Federal mag and the CCI mag primers.

Wanting to discover the puzzle of the Knight Disc with the Nikon Scope, and remembering what 1874 sharpshooter told me, we grabbed some BlackHorn 209, Remington primers, 300 grain SSTs, 300 grain Speer Deep Curls, EZ load sabots, MMP 12 sabots, and some Harvester Crushed Rib sabots and out to the range.

The range finder said 50, and 51 yards at first. I wanted to check the rifle and get a boost of confidence before moving back to the 100 yards station.

I want to note 1874 Sharpshooter saved me grief. I tried that popping on a spent primer a second time, and then the Remington primers came right out of the rifle!!! Happy Days.

Since all you maniacs shoot 110 grains or more of BlackHorn 209 I figured what the heck!! I loaded up a 300 grain SST in a sabot, and 110 grains of BlackHorn 209. I fired and knew that I had shot off a rifle. And since I was told my swabbing was bad, I did not swab and shot two more.



Shot one was on a clean barrel, but the next two were fine. What concerned me was how high they were hitting. But I "guessed" that they would come down, back at 100 yards.

So I marched the target back through the woods. Man it was hot. 85 degrees and humid. I got the target back there and walked out. I discovered my little hike had given the rifle barrel time to cool. Because with just three shots.. it had gotten hot.

I then fired two shots. Unfortunately the photo don't show them. They were even higher, up at the edge of the target and the range finder said 102 yards. Now I was upset. Before it shot so well at 100 yards. So I marched back and adjusted the scope down.

ADJ was the first adjustment. Then I fired three more. Not a bad group, but I needed to adjust, and come up. It was then I realized the sabots I were grabbing were a horse from different towns. Some were crushed ribs, some EZ load and some I had no idea what they were.

I then had made my adjustment and shot three shots. One was in the bull and the other two on each side of the rifle. I also noticed that when loading, there really seemed to be fouling build up. AND I KNOW YOU DON'T HAVE TO SWAB. But I got some alcohol and applied just a little but to a patch and swabbed the bore. When I swabbed between shots, it shot three just above the bull and touched. I then did not swab, but the barrel was pretty clean still and it put two in the bull.

So.. more questions. Have any of you tried to swab with alcohol and if you did, did it make a difference in accuracy of the rifle? Also do others have to shoot a dead primer to make it come out, other then Sharpshooter? By the way, SS thanks for that heads up.

After shooting the three SST 300 grains with 110 grains of powder, and the ones when I adjusted the scope, I have to admit, those in the center at 100 yards were shot with 90 grains of BlackHorn 209. I backed down on the charge and went to what my notes said was accurate. That 110 grains was really punishing me. And I saw no reason to take it.

Do you think its the old 24 inch barrel my rifle has that makes it like less powder? I mean I have no doubt of the 90 grains and a 300 grain .454 Deep Curl as a hunting load. And it is accurate.

Nice shooting Dave. As you know the 90 grains will do anything you need it to do. Why punish yourself by shooting more unless a person would need to for accuracy? For sure with your rifle you don't need to, not with that 300 grain SST anyway.

I really wanted to see if I was missing out on some "extra accuracy." All I noted was after about five or six shots, my shoulder was not liking it. Backing down just that 20 grains, made all the difference in the world. I have to agree with you. 90 grains of that and a 300 grain Deep Curl would sure play the devil on a white tail.

That is some good shooting. I'm glad the primer issue is solved, or at least seems to be. I only shoot 110 to 130 gr with a 250 gr bullet . I don't shoot that with a 300 gr . Although with my GPH I have to shoot 110 with 425 conical for accuracy,
Even with 90 you should be able to turn that into a 200 + yard gun
The 45 should get a chance next , right? I'm looking forward to seeing what it does , especially with the dead center 260 gr.
Great shooting

In fact, it got to where I would shoot, then automatically re-cock and fire it, then the Remington primer seemed to come right out. Have you ever tried swabbing when shooting BlackHorn 209? I want to do more testing but I have an itch that it might actually help. Time will tell.

I haven't tried swabbing with Blackhorn. But I might try just to see. I hope to get out this weekend and do some shooting . I need a break from antelope hunting I snuck within 76 yards of a nice buck for the second time but couldn't close the deal. Snuck within 25 yards of a doe but didn't want to kill her in front of her fawn.
I guess I'm getting soft. So a range session with the 45 would be a good break from the bow .

If you're getting soft. So, am I. I wouldn't have shot either.