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by mtngun
Mon Feb 04, 2008 6:15 pm
Forum: pressure measurement
Topic: how not to attach a strain gage
Replies: 0
Views: 5290

how not to attach a strain gage

from the old forum: Some of you will probably get a Pressure Trace eventually so maybe you can learn from my mistake. :oops: You are only supposed to use particular adhesives to attach the gages. The instructions make that quite clear. Most of the approved adhesives are priced as if they contained ...
by mtngun
Mon Feb 04, 2008 6:27 pm
Forum: pressure measurement
Topic: Cast in 7-30 carbine
Replies: 3
Views: 4832

Re: Cast in 7-30 carbine

from the old forum: This post is going to talk about my experiences with the pressure trace system in boring detail, but some of you who are also learning to use the pressure trace or who are thinking about buying a pressure trace may find the details useful. Since last time, I repositioned the gag...
by mtngun
Mon Feb 04, 2008 6:33 pm
Forum: pressure measurement
Topic: two strain gages on one gun
Replies: 4
Views: 6626

two strain gages on one gun

from the old forum: Since the last range session, I mounted a second, new strain gage on the 30-06. It is located in the same place as the other gage, except the old gage is on top of the barrel while the new gage is on the bottom. In theory, they should give the same results, but I was concerned t...
by mtngun
Mon Feb 04, 2008 6:40 pm
Forum: pressure measurement
Topic: two strain gages on one gun
Replies: 4
Views: 6626

Re: two strain gages on one gun

This data was taken with gage #2, as discussed on another thread, and no adjustments were made to the calibration even though the validation load was 5000 psi high. In other words, I believe the pressures shown here may be about 5000 psi higher than the true pressures. http://www.mountainmolds.com/p...
by mtngun
Wed Feb 06, 2008 7:45 am
Forum: General
Topic: snowed in
Replies: 5
Views: 4468

snowed in

I've been snowed in for a week and a half. It might be another week and a half before I can drive to town.

Mold production continues, however, there is no way to ship molds to customers.

I would post some pictures but all you can see is white. :P
by mtngun
Thu Feb 07, 2008 2:17 pm
Forum: revolvers
Topic: BFR 500 S&W
Replies: 0
Views: 4918

BFR 500 S&W

Here is a customer's design for the BFR 500 S&W. This design will NOT chamber in S&W revolvers. For S&W's, shorten the nose to 0.690" or thereabouts.. I can't vouch for the measurements -- you might want to verify the bore diameter, for example -- but overall this looks like a decen...
by mtngun
Thu Feb 07, 2008 3:31 pm
Forum: General
Topic: Cast Bullet Velocity Parameters
Replies: 2
Views: 3586

Re: Cast Bullet Velocity Parameters

My experience with wads is limited to a few experiments with NECO wads under gas checked bullets. If I remember correctly, the wads didn't help things one iota, so I didn't pursue them further. Gas checks make life far easier, even at lower velocities. Plain base rifle bullets are for someone who ju...
by mtngun
Sat Feb 09, 2008 2:32 pm
Forum: General
Topic: snowed in
Replies: 5
Views: 4468

Re: snowed in

Neighbor's barn, looking down into Snake River Canyon. Seven Devils mountains on the horizon.
by mtngun
Sun Feb 10, 2008 5:10 pm
Forum: hi velocity
Topic: Paper patch in 30-06: with and without a GC
Replies: 3
Views: 8839

Re: Paper patch in 30-06: with and without a GC

............ To start with, let's think about whether or not the paper can handle rotational forces. True, paper has a very high tensile strength, much, much, higher than lead. But, conventional wisdom -- and I will be the first to be question conventional wisdom -- says that the paper is cut by the...
by mtngun
Sun Feb 10, 2008 5:20 pm
Forum: General
Topic: tumble lube bullets
Replies: 0
Views: 4213

tumble lube bullets

from the old forum: I was wondering if the bullet design program can produce a bullet with microbands like Lee produces. I like the tumble lube idea, and versatility. Thanks, Answer : 'No, in fact, there will eventually be some changes to the program to increase the minimum band size, proportional ...

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