Discussion for Pressure Trace wk.5

Richard, been trying to follow along, why is there not the second spike in the 5744 load like the rest?

Best threads in the business.... thanks Richard.

good stuff

thanks Richard

Richard, you go through your cleaning routine between each shot correct?

I was wondering if you wouldn't mind taking the 55 grain N110 or the 5744 load that gave such a clean trace and shooting it clean on the first shot, but then no swabbing or anything in between.

I just wonder if your Rem Oil or something may be giving you an advantage over others in your ability to shoot these heavy doses of powder at high velocity without blowing the sabots.

Your traces always seem to be much lower than predicted and since Jim Ristow does not feel that it is a PT error then there must be something else that allows you to do it.

Logically it would seem that you have a very low friction that allows the bullet to move far enough initially that the volume is reduced which does not allow the pressure to reach anywhere near what is predicted or seen by my traces or those of TGinPA.

edge.

So Edge...........you want me to not clean to see if I can blow up my barrel?? ;D ;D............I think I can do that! I will shoot the 50 gr. load. Maybe with both N-110 and 5744. I assume you are just looking to see if the pressure builds up with the succeeding shots?
OK, so here is the cleaning or rather conditioning procedure I use: Rem Bore Cleaner....NOT Rem Oil!!!!! I use about a 1 3/4" patch and put just FOUR drops equally spaced around the inner edge. I use the .45 Spin Jag on my home made brass rod and run the patch in and out ONE time. I follow this with a clean patch in and out ONE time.............After the next four succeeding shots I do the same thing with the exact same patches as I started with. Four drops does no where near soak the patch.......It just barely dampens parts of it. What I think it does do, is to remove loose fouling/carbon or whatever else exists after firing a shot. I would not even liken it to swabbing the bore. It is practically dry. And each time I turn the patch's over when I re use them. After five shots they get retired. By doing this, seating of the bullet/sabot has a very smooth feeling.........Not that grating/gritty feeling when you do nothing. Maybe this is what keeps the sabots from getting torn up???
Herman rarely cleans and he has little problem with blown sabots?
My feeling is this: If you can feel any scraping as the bullet/sabot goes down the barrel, It must be causing some type of abrasion? I don't know how much and will it wear out your barrel doing so? I don't know? But I do know I am comfortable the way my gun loads and feels and until some time that I can be convinced to do otherwise, I will continue..........AFTER Edges experiment ;D
Richard

I don't believe he has...............It was the first time I tried it and he will usually try loads I have shot first. He was not at the range with us Wednesday either. I think the fact that my group was not that good, he would probably not use it??? Plus the fact that he has gotten good results with the 15/55 duplex and the same velocity with less pressure, I doubt he would even be interested in shooting it. Plus the 15/55 (N-110/H-322)duplex has been so accurate for both of us. When I saw the difference is pressure between the two, I was convinced that the duplex is the way to go. Hey, it might be good for back up or second shots in a hunting condition where you don't want to fool with loading a duplex???
Richard