Home Forums Hunting & Shooting Muzzleloaders Headspacing a Knight Breech Plug (For NO Blowback)

I thought it would be good to do a YouTube Video on Shimming/Headspacing a Knight Bare Primer Breech Plug, This is geared toward the folks that do better when they can get a Visual on a Project. Mr Sabotloader has an AWESOME Pictorial Layout on doing this SIMPLE Procedure (How i learned to do it) Hopefully he will ad that here in this Thread , This is REALLY easy to do Folks, and it WORKS EXCEPTIONALLY Well, After 10-12 Shots of Real Blackpowder Through my New Knight Mountaineer You could eat from the Breech of my Rifle, it stays as clean as a Centerfire! If you follow this procedure it puts an END to “Blowback” I have had ZERO Stuck primers, When i open the Bolt the Spent Primers literally Fall in my Hand

Do yourself a BIG favor and get a Lehigh Breech Plug, and Vent liners. Here is a link to them
http://www.lehighdefense.com/all




Here is what my Primers look like from 2 Different outings, 2 Different Powders/Projectiles

Spent primers using Real Blackpowder


And after using BH209

Good one. Thanks.

I gave my Ultra Light to my son, who has a much longer season in VA than we do. He killed four with it last year. I'll pass this on. Do different primer brands require different shim thicknesses? I know some I tried were too large in diameter to fit my plug. It's not inconceivable that they differ in length a bit as well.

BTW, I strongly suggest anyone buying one of the Knights to get one with sights, just in case you ever get a chance to hunt in someplace like CO. He's having to borrow my Strike for his elk hunt, and I've got to pull the scope and remount the irons on that.

This is the deer my other son took with that UL the year I bought it, 2014 IIRC. 80gr BH and a 300gr .45 XTP.

Nice Whitetail Buck!! Look at those LOOOONG Split Browtines, COOL!!

Yes 209 Primers do Vary in length

This Chart is NOT mine, nor my Work, I pulled it from the WWW

I see the Primer Chart above was work done by Busta (fine print at bottom) Credit should ALWAYS be given where it’s Due 👍

A short Rant about the above. I’ve seen my work hauled to other Forums and Claimed, It’s a CRAP Deal when someone does that. But it’s the Web, if you are ok with putting it on here and Sharing it, you need to learn to be ok when Someone Steals it, And Claims it to be their own (it’s happened to me plenty of times!) And the Oldest 1 in the Book, You Post something Cool and unique that Works EXTREMELY well and someone comes on with “I have always done it that Way” I’ve seen that one a LOT! There are Good, Genuine folks on all of these Various Forums, But there are also CULLS, Just gotta Weed through 👍

Thanks to Busta, then. Based on what I've read concerning other primers, his chart likely only applies to those lots of those primers, as there seem to be some variations between lots.

My original factory plug wouldn't accept Fiocchi primers due to their larger O.D. So far, my Strike swallows them all, and if one's a bit sticky, the break action makes it easy to get at, and if need be, you can tap out the insert and replace it (hasn't been necessary so far).

So far, the sons have taken 9 or 10 deer with that rifle, but Dad only one, a scraggly freak carrying a crossbow head in its shoulder.

Here's one from last season:

Pappy348, I agree with you on variations between Primer lots, Busta’s chart above is Old. I am shooting Win 209s currently, and have noticed that Several will feel Fairly Snug when Closing the Bolt (Due to Headspacing as i showed above) Then i get 1 here and there that has very little felt Resitance. But even the ones that have Very little felt Resistance are Sealing, as i get NO BLOWBACK! Just think if had NOT Known how to Headspace My Breech Plug? I would be getting LOTS of Blowback.

A person needs to take primer variation in to account when Shimming/Headspacing off the Primer as i showed above. You don’t want the Bolt RIDICULOUSLY tight, Just Snug so you are getting some “Crush” on the 209 When the bolt closes

Nice video.

I've been waiting for my UL plug to go south, I've heard around 100 shots, but haven't had any issues so far. Mine works great with W209s, but I was wondering how the shimming deal worked in case I need to do it when I replace my plug. Makes perfect sense now.

One question, who made that scope base on your ML?

Murphy’s Precision, They aren’t Cheap, But are VERY HIGH Quality 👍 I went with a 20 MOA, He can do whatever you want

https://www.murphyprecision.com/Products/Item/1451

Oh how I wish we had a TRADITIONAL MUZZLELOADER forum!

Thanks! Those do look nice.