Coonabarabran MR & Long Range F Class Invitation shoot

[ratshot]

What length barrel are you useing 30 inch seems to be min with 32 to 34 inch more common, for the extra speed but match rifle has a restriction on barrel weight of 2.5 kg so thin fluted barrels are required . There is also "slow" barrels out there no matter what you try where as other breeds do it easy. with that load you are useing is close to max , what is case life like ?. have you been talking to MR shooters to get that load info. Cheers.... also molly or naked pills.

[CodeBasher]

Please note only rifles that meet Match Rifle and F Class Open (i.e. up to 8mm) are permitted..

So F-Class Standard is out of the question?

just curious.

cheers

[AlanF]

Please note only rifles that meet Match Rifle and F Class Open (i.e. up to 8mm) are permitted..

So F-Class Standard is out of the question?

just curious.

cheers

F-Class standard specs are within F-Open, so would be allowed in the F-Class category. but at 1500yd, there would be a very big question mark about the wisdom of using 155gn projectiles. I've heard of few who've managed 1200yd, but 1500yd is a quantum leap above 1200.

Alan

[bainp]

The program for the Coonabarabran shoot has the Grand Aggregate made up only from the shoots at 1000, 1100 and 2 x 1200 yard. The two shoots at 1500 yds is a seperate aggregate. Because 1500 yds has never been shot before in Australia we have no idea if it is going to be successful or become a farce (we hope not) because of lots of misses. For this reason we kept the aggregates seperate.
The F Class standard Rifle fits neatly under F Class Open rules so it is quite legitimate to to compete with a rifle of F Class Std specs and you are still able to compete for the Grand even if you are not competitive at 1500.
The program also allows extra sighters if required because we know that this will be the first time some competitors will have shot at these extreme ranges. The Match Rifle and Long Range F Cass community are pretty relaxed about letting competitors know where the shot went if you get a miss also ( because the damage is already done, so why prolong the misery).

[tasvh63]

Thanks guys, ratshot the barrel length is 31", so i guess by what i have read here then if my barrel is chambered for 210 grain projectiles then the throat should be adequate for the 208's. Phil if you dont mind me asking what brass do you use and you you agree with ratshots view on this?? I have both winchester and lapua i use lapua for f class usually, but if they are the better brass to use then so be it!

Once again thanks for your help, its one of the best thing that i have found about Match rifle shooters they are not into secret squirrel crap and most are willing to spend some of their valuable time helping new shooters out especially some one like me who only started shooting of any kind in may last year.

Cheers

Kris

[AlanF]

Here's a few figures on some typical bullets used at MR and F-Class events. Calculations are based on G7 drag tables. If the velocities are not what is typically used, let me know and I can recalculate.

[RDavies]

F standard shooters can use their rifles with 155gn Lapuas (not that they are much better than the BJD HBCs). They can also use VV N540 high energy powder to get the extra speed. The main thing will be how the bullets go transonic. I used a 22BR with flat base bullets at 1100-1200 yds which was below the sound barrier and it was not too bad. Maybe some Match rifle shooters can let you know how certain bullets go transonic.

[Woody_rod]

So we talking 220 grain bullets (for example) with say 300 Win Mag??

[RDavies]

Rod, there will be at least 1 new shooter using a 300 Win Mag with 210gn bullets at this shoot.

[Paul Janzso]

Do the VLD's have to stay well above the speed of sound?
Will 3,000 fps with a 190gn VLD Berger make it ?
That is what I can easily get from my 300 WSM with an es 8 and sd 8. and a bug hole group.
I'm getting 2840 fps with 210 gn VLD Bergers, or should I work up a load with 200 gn and 220 gn Sierras. Come to think of it I used 220 gn Sierra MK's at the 2008 S.A. Queens in a 300 WSM and I was getting 2850 fps, would that do for 1,500 yards?

Cheers
Paul

[AlanF]

Paul,

Here's the figures - looks like the Berger 210 has the best chance of staying above Mach 1. Would be interesting to see how the 240 SMK would go in your WSM.

Sounds like you're planning to shoot at Coonabarabran?

Alan

[Paul Janzso]

Hi Alan.

Yep, I would like to go but where is Coonabarabran?

I have checked my elevation and with a 17 degre Barnard scope rail I have only 40 min elevation, I would have to get a steper rail. From my 300m zero I have 20 min below that, so I recon I would have just enough elevation in the scope itself if I had the right tapered rail.

I will get onto Barnard and see if they can help.

Cheers
Paul

[Paul Janzso]

I just googled maps and found Coonabarabran, may be I should just head there from the Vic Queens.

Cheers
Paul

[AlanF]

...I have checked my elevation and with a 17 degre Barnard scope rail I have only 40 min elevation, I would have to get a steper rail. From my 300m zero I have 20 min below that, so I recon I would have just enough elevation in the scope itself if I had the right tapered rail...

Paul,

Does your scope reticule have any horizontal lines or other sharp features below the centre? Unless you intend to do a lot of match rifle, you may have the option of using a different aiming point in the reticule - its just a matter of knowing how many minutes elevation it is different from centre. Alternatively there could be something sharply defined above the target on the stop butts to use.

Regarding Coonabarabran, its about a day and a half driving from Bendigo (up the Newell Hwy), so it'd make sense to stay in Vic or NSW after the Vic Queens if you can spare the time. I'll be returning home to Eastern Vic, and going to Coona via Canberra.

It'll be great to see you at both events. Sounds like there'll be a 300 Win Mag at Coona to keep you honest!

Alan

Alan

[Paul Janzso]

Hi Alan

I'm using T36 Weaver with a 1/8th dot. No other sighting marks in the reticle.
I have spoken to Keith Hills and Phill Bradshaw, they have pointed me in the right direction with regards to altering the scope rails angle to get me out to 1,500 yards and maybe beyond.

Cheers
Paul