Search found 693 matches

by williada
Sun Jun 24, 2018 10:01 pm
Forum: Events
Topic: Nraa queens
Replies: 27
Views: 1935

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: 6866

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: 707

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: 3526

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: 3526

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: 3526

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: 3526

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: 3526

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: 3526

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: 3526

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.
by williada
Tue Jun 05, 2018 11:55 pm
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 3526

Re: Barrel Behaviour Theory

John, there is a nightmare of different vibrations patterns to get your head around as we try to identify their sources, then try to work out how they mesh or interact and a lot of blokes who are specialists in this field know more than me. Yes, seeing some of those changing sections induced from th...
by williada
Tue Jun 05, 2018 3:41 pm
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 3526

Re: Barrel Behaviour Theory

Peter, I am about to head out the door. But the fact that Purdy uses the odd number harmonic values calculation means he can't be applying open tube harmonics but rather closed tube harmonics and I am thinking the difference in true values may be due to atmospheric reflection as the air pulse moves ...
by williada
Tue Jun 05, 2018 2:43 pm
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 3526

Re: Barrel Behaviour Theory

Peter, my mind got ahead of my fingers doing the typing by looking at the similarities and differences and so I edited the previous post. There is the added complexity in the rifle barrel of the two closed ends one being the bolt face and the other being the base of the bullet as it moves forward. T...
by williada
Tue Jun 05, 2018 11:15 am
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 3526

Re: Barrel Behaviour Theory

John I may have confused you earlier on another thread when I commented Varmint AL was looking at two closed ends like a guitar string and not one closed one end and open at the other in a tube. I think I used the term open in Al's discussion as the mind was going faster than the fingers could type....
by williada
Mon Jun 04, 2018 11:35 pm
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 3526

Re: Barrel Behaviour Theory

Well going by the number of hits John there is quite a lot of interest. Bet a few sharp guys from the United Kingdom, NZ and USA are not missing a beat. The ones we have to get into the sport are a new better educated breed because most kids these days finish year 12 maths who will lap this up but s...

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