Week #41

Richard

What I find interesting is that in group 2 your 1st shot is the furthest out and in group 3 your 5th shot is the furthest out from your group. Also maximum horizontal spread appears to be only 1”.

Good luck with your upcoming 600yd match.


Ed

And yet, you would think warmer temperatures would produce higher velocities? No? But really, I don't think I am dealing with any big spreads in temperatures? We shoot from inside a heated room. I use the cool rod any time I feel the barrel getting slightly warm. This occurs only after two shots where upon the cool rod is inserted. Actually After the first two shots of the day, I used the rod every shot. Loading pressures seems the same. I mic'd all three saboted bullets and both the XTP and SST are right at .400". The Barnes is maybe .3998 to 9! This same difference appears when mic'd across the sabots.
Edge........one of the members asked me If I had shot 78 gr. of H-4198 with a 275 gr. Parker? Obviously, I had not and to me it sounds way out of line? He said a friend was shooting it out of one of the custom ML's? I have never shot more than 66 gr. with a 250 XTP sabot less.
Thoughts?
Richard

Richard,

I sort of remember that claim and wondered if it was a typo or if the poster was shooting 50 cal?? If it was 50 cal with sabotsI would say he was fine.

As you know, I shot 80 gr H4198 with 250's 100's of times as well as a 5 shot group with 76 gr H4198 and 300 SST's by accident cause I grabbed the wrong powder vials. No problems, blown sabots and very acceptable groups.

78 gr and a 275 bullet would be right in my wheelhouse with my 50's....except that the Parker is a mushy varmint bullet. However, I digress.

If this guy was shooting this in a sabotless .45 I would think not only is this a little hot, but he has NO room for a mistake. From my speer manual, I make a slight correlation by looking at .458 Win mag data where the lightest bullet shown is a 350 gr bullet and the max amount of H4198 is 71 gr for about 2500 fps. This cartridge is rated at 53,000 psi. Drop 75 gr of weight and add 7 gr of powder and the load would probably be close in pressure and the 2900-3000 fps Dave mentioned above is plausable.

That would be a slammer of a load....and as I digress again.....a load that I would want with a tougher bullet

Sabotless .45 Wilms.

I think the plug Richards uses is also smaller in diameter in the threads than the Savage plug, adding a little more material to the barrel for strength.

Smokeeter. I bought his dvd and he is using a knight and nipple. The plug does look up to the task. If anyone is interested I can view the tape again it gives the part no. for both?
Jon

Hillbill........If I am not mistaken, Swinglock puts a chamber in their rifles no?
Anyway, I'll stick with my duplex loads.
Richard