Search found 61 matches

by sungazer
Mon Jul 30, 2018 8:56 pm
Forum: Equipment & Technical
Topic: Ultrasonic Cleaning of Barrels
Replies: 3
Views: 374

Re: Ultrasonic Cleaning of Barrels

You could certainly build a tank and attach this to it to create an ultrasonic cleaner. I have seen professional cleaners that just have a couple of large transistors mounted to the tank, these transistors are then switched to the frequency desired. It is just their mechanical movements that operate...
by sungazer
Thu Jul 19, 2018 8:50 pm
Forum: Equipment & Technical
Topic: Grouping after 7 to 8 shots
Replies: 14
Views: 687

Re: Grouping after 7 to 8 shots

Is it the factory Howa Barrel or another Aftermarket barrel? if so what is the profile?
by sungazer
Sun Jun 10, 2018 10:08 am
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 4043

Re: Barrel Behaviour Theory

williada slightly on a tangent to this topic but related is I often wondered if a barrel tuner was in fact helping more with the job of acting like a crown than anything else. Is a larger crown face going to help set up that pressure wave behind the projectile and improve its accuracy? I wonder when...
by sungazer
Sun Jun 10, 2018 10:03 am
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 4043

Re: Barrel Behaviour Theory

Peter sorry if my posts seem argumentative they are not intended to be. My written communication leaves lots of room for improvement. I have an electrical / electronic background and have dealt a lot with harmonics on the power grid. I understand the higher frequency has more energy for a given ampl...
by sungazer
Sat Jun 09, 2018 12:06 pm
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 4043

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 a...
by sungazer
Sat Jun 09, 2018 9:09 am
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 4043

Re: Barrel Behaviour Theory

Peter I dont understand why you are so fixated with the standing wave. As you have shown any traveling wave will cause a deflection of the barrel. That traveling wave will reflect back and forward until its amplitude has dampened down due to the energy being converted to other forms of energy. Those...
by sungazer
Thu Jun 07, 2018 4:42 pm
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 4043

Re: Barrel Behaviour Theory

Ok if we take just the speed of sound as the first component of causing waves at 19000 fps it takes 1.57*10-4 to travel the 3ft. The bullet takes 1ms. So in this 1ms time period the speed of sound can reflect a total of 3 times to the muzzle end and back (6.3 in total) Therefore we dont need to look...
by sungazer
Thu Jun 07, 2018 11:43 am
Forum: Equipment & Technical
Topic: Barrel Behaviour Theory
Replies: 79
Views: 4043

Re: Barrel Behaviour Theory

I would argue the point re the action being free to move. I would have said that the clamped free would fit the rifle better. The action is pretty well bedded and then pulled pretty tight into that bedding. Surly that is a clamped end?
by sungazer
Wed Jun 06, 2018 3:03 pm
Forum: General Forum
Topic: RCBS Chargemaster
Replies: 3
Views: 557

Re: RCBS Chargemaster

You could stop by Australian Reloading and trade FB page a Mark Grainger sells a lot of them probably grey import he seems to service them as well.
by sungazer
Mon Jun 04, 2018 10:43 pm
Forum: Full-bore/Target Rifle
Topic: hey blokes
Replies: 12
Views: 1086

Re: hey blokes

I have seen the photo of one of the guys face. its a nasty mess. The bolt failure was real.
by sungazer
Mon Jun 04, 2018 6:04 pm
Forum: Full-bore/Target Rifle
Topic: hey blokes
Replies: 12
Views: 1086

Re: hey blokes

You cant dispute that there has been issues in the past. Two guys at the club have eye injury's or only one eye due to failed omark bolts. I think the smiths are just protecting themselves to future possible injury claims.
by sungazer
Sat Jun 02, 2018 8:16 am
Forum: Equipment & Technical
Topic: More on Barrel Tuners
Replies: 147
Views: 7447

Re: More on Barrel Tuners

Thanks willada I would really like to keep the conversation going but I can see that written correspondence has its limitations. To get into the detail it really requires verbal and a whiteboard and perhaps some instrumentation and practical experiments / demonstrations.
by sungazer
Thu May 31, 2018 6:37 pm
Forum: Equipment & Technical
Topic: More on Barrel Tuners
Replies: 147
Views: 7447

Re: More on Barrel Tuners

My question is more along the lines of what causes the fundamental, and how is that faster at traveling down the barrel than the projectile. The first step would be to determine what is the cause of the fundamental, what is its frequency? then we know the time it takes to travel, we can then also ha...
by sungazer
Sun May 27, 2018 3:52 pm
Forum: Equipment & Technical
Topic: More on Barrel Tuners
Replies: 147
Views: 7447

Re: More on Barrel Tuners

Would you mind sending me a PM with your answers and reasons. As I am sure I can not answer the questions correctly.
by sungazer
Sun May 20, 2018 7:25 pm
Forum: Equipment & Technical
Topic: More on Barrel Tuners
Replies: 147
Views: 7447

Re: More on Barrel Tuners

It has all been said but you ask this question "Yeah - I find the waiting on more evidence bit is where the sticky bit is. Evidence of what " There are harmonics in many different areas for example in electronics you find them in radio waves and tuning for antennas it is something that can...

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