Search found 698 matches

by williada
Wed Aug 08, 2018 4:00 pm
Forum: Full-bore/Target Rifle
Topic: Stock type?
Replies: 9
Views: 519

Re: Stock type?

Tom's older stocks had the words "Top Cat" printed on the front take down screw washer. Does not resemble one of Jeff''s that I have but he used to cut off many patterns. Its a possibility. But it is a striking resemblance to a Week's Stock I had, looking at the wood, butt shape and grip.
by williada
Mon Aug 06, 2018 8:10 pm
Forum: Equipment & Technical
Topic: 7mm SAUM Rechamber/Barrel Life
Replies: 29
Views: 1303

Re: 7mm SAUM Rechamber/Barrel Life

The 7 SAUM is a wonderful chambering and more efficient than a real barrel burner such as the 7 WSM. Its short powder column extends its efficiency to reduced loads which other chamberings may find difficulty achieving which group superbly and do take the pressure off the throat which hotter loads e...
by williada
Mon Aug 06, 2018 5:02 pm
Forum: Equipment & Technical
Topic: 7mm SAUM Rechamber/Barrel Life
Replies: 29
Views: 1303

Re: 7mm SAUM Rechamber/Barrel Life

Similar question was asked of me a few years ago and current information is bearing out my reply at that time - a chamber nip 700-800 rounds to maintain peak accuracy. That being said, I used Bartman's 7 SAUM which was let go to 1700 rounds (I think from memory, Mike may be able to clarify that) bef...
by williada
Thu Jul 26, 2018 9:48 pm
Forum: Equipment & Technical
Topic: New Barrel??
Replies: 6
Views: 690

Re: New Barrel??

BC, it sounds like it is getting a bit long in the tooth. There must be someone in your club who can look down the barrel after a thorough clean. For a gunsmith to work it over at that round count is not worth it unless someone with recognised skills does it as a freeby. Often a barrel with that rou...
by williada
Wed Jul 25, 2018 9:01 am
Forum: Equipment & Technical
Topic: New Barrel??
Replies: 6
Views: 690

Re: New Barrel??

BC, as David suggests there are a few factors. As a general rule a match barrel can be set back a little and chambered at about 1500 rounds. Many a good barrel just seems to still shoot despite a small reduction in length even after several nips on the chamber. However if the barrel is let go too lo...
by williada
Sun Jun 24, 2018 10:01 pm
Forum: Events
Topic: Nraa queens
Replies: 27
Views: 2315

Re: Nraa queens

The standard is red hot at the moment. Congratulations to all winners. Wow, James Corbett. Good to see you on top Denis and Krakey, so close.
by williada
Mon Jun 18, 2018 7:51 pm
Forum: Equipment & Technical
Topic: More on Barrel Tuners
Replies: 147
Views: 7599

Re: More on Barrel Tuners

Thought I would peruse Benchrest Central and read a comment Gene Beggs posted who I really respect. Think the boys stateside are playing catch up with us in Oz. I notice the phrase "positive compensation" is creeping into their vocabulary. I think Gene's comments are worth a read. http://b...
by williada
Fri Jun 15, 2018 10:10 am
Forum: Equipment & Technical
Topic: What calibre?
Replies: 13
Views: 849

Re: What calibre?

Scott stick with the 6 Br.
by williada
Wed Jun 13, 2018 1:29 am
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 4143

Re: Barrel Behaviour Theory

Trav ask yourself when does the mass turbulence occur, how is it formed in different stages and where is the pressure exerted on the projectile? Then you will understand its significance. Then consider a TR shooter who uses perspex rings in the rain. Why do they get drop build up on the front sight ...
by williada
Sun Jun 10, 2018 10:43 am
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 4143

Re: Barrel Behaviour Theory

Hey Alan F, when do I get a pay rise? :D

Sungazer, now you are talking. When I get a chance I will move this discussion back to the tuner thread.
by williada
Sat Jun 09, 2018 9:34 pm
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 4143

Re: Barrel Behaviour Theory

Good questions Sungazer, but the responses are becoming wordy. Practical demonstration is really the way to go. One of the essential elements of accurizing a firearm is to make sure that over pressure waves at bullet emergence and secondary flashes do not disrupt the bullet from its path. Traditiona...
by williada
Sat Jun 09, 2018 1:28 am
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 4143

Re: Barrel Behaviour Theory

Peter Wikipedia describes inertia as: “Inertia is the resistance of any physical object to any change in its position and state of motion. This includes changes to the object's speed, direction, or state of rest. Inertia is also defined as the tendency of objects to keep moving in a straight line at...
by williada
Fri Jun 08, 2018 12:21 pm
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 4143

Re: Barrel Behaviour Theory

Peter is rightly holding some of the other modes constant before they are introduced to see further changes. When we look at further steps, bear in mind that radial shock waves in steel as opposed to air in a tube are much, much greater. Air tends to have longitudinal reactions in a tube. That means...
by williada
Thu Jun 07, 2018 2:29 pm
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 4143

Re: Barrel Behaviour Theory

John the way to think about this IMO is there are a few different systems operating. To get my head around this, I broke the systems into macro (big) and micro systems (small). The macro to me indicates the direction which something is flung and the micro represents the precision of which something ...
by williada
Wed Jun 06, 2018 11:15 pm
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 4143

Re: Barrel Behaviour Theory

Its a pain getting timed out on this site when typing and it looks like more edits than there were. I added a bit more to previous post to rather than write a separate one to cover John's question. Lead on Peter.

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