The 09 DISC @ the Farm

sabotloader · 02-18-2010, 02:36 PM

Headed to the farm this morning to see if my modification to the primer well of the Breech Plug reduced the blow back in the breech area.

I had installed two #2 Stainless steel washer in the primer well and ontop of the existing primer bench. Several people are using 'O' rings to accomplish the same thing. I am hoping by using the stainless washers I will have a more-or-less permanent application.

Here is a picture showing the first attempt...

The trip to the farm this morning - proved that a primer well depth of 0.200 is still to deep for the primers to bottom out. The beginning depth is 0.236.

The rifle shot very well with the primer well modification and the Lehigh vent liner in the other end. Just took 6 shots - that was enough to tell be that I had not accomplished my goal. It was some what cleaner but not good enough.

Brought the rifle back to the shop and re-worked the inserts. I now have 2 press fit washers installed in the well. One number #3 and one #2. With this installation the primer well depth was reduced to 0.185. I now can feel the bolt camming action pushing the primer against the primer bench.

I then fired some primers in the shop and I think I have reached the point I was looking for. Hopefully, I will be able to get out tomorrow and shoot the gun again.

rafsob · 02-19-2010, 07:33 AM

Sabotloader you are a welcomed wealther of knowledge on this forum.

Thank you sir!!!

cayugad · 02-19-2010, 08:24 AM

If you were to shoot say ten rounds... would you have to clean the washers? You sure have a quest it seems to develop a rifle with no blow back. The only rifle I own that comes close to that is my Genesis.

Semisane · 02-19-2010, 08:37 AM

Quote:

You sure have a quest it seems to develop a rifle with no blow back. The only rifle I own that comes close to that is my Genesis.

My Omega X7 gets a little blow back with T7, but is clean as a whistle with GOEX down the bore. I have lots of GOEX. Don't really need anything else for my 175 yard max hunting situation.

sabotloader · 02-19-2010, 08:38 AM

cayugad

Quote:

if you were to shoot say ten rounds... would you have to clean the washers?

No, I should not have to - they act just like the primer bench that is already in the breech plug... They will turn black, but all the pressure is directed through the hole...

Quote:

You sure have a quest it seems to develop a rifle with no blow back. The only rifle I own that comes close to that is my Genesis.

Maybe the Triumph and 25acp in my Omega spoiled me, they are really clean - I really do not mind some blowback in the breech area - seems like that should be part of shooting an ML... but since Tom started the ideal of a clean breech in a Knight - I just sorta grabbed on to it.

The worst part - I can not even imagine ever hunting with a NFPJ - I would never be able to drop the primer in the little opening - I have to use tweezers now - but I woud use the NFPJ at the range - just to save FPJ's even though I re-use mine over and over again....