AusVarmint

G'Day All,
Just a couple of quick questions.......

1. What is the un-turned neck diameter of a loaded round with a typical 6mm LR bullet? And could you tell me which bullet and also measure say 10 rounds and give the min and max dimensions please?

2. What sort of MV do you get with the 105-107 gn projectiles with this cartridge?

3. And what sort of accuracy in moa do you get with the un-turned neck and also what is your rifles chamber neck dimension?

4. Those of you with tight neck chambers what size is you chamber neck/loaded round diameter and your accuracy in moa with the tight necks please

Many thanks,

cheerio Ned

I can't answer your queries, Ned, but there's a good post on neck turning on the 6MM BR site right now.

I'm very interested in a response as I too am having a rifle made up in 6x47L.

Have you seen these webpages? Might help answer some questions.

http://www.6mmhot.com/Home_Page.html

http://www.6mmbr.com/gunweek073.html

http://www.6mmbr.com/gunweek079.html

Good luck

dee cee

G'day all,
yup been trawling those web sites for month now, its been a idea in the back of my mind since I started F class, first the 6BRX now the the better/easier(?) 6x47lapua. I'm close to building one but want to finalise the deatails first, even if I have to get a reamer made in .268 or .269 neck to suit.

Cheerio Ned

Ned,

Bit flat out at the moment but if you can wait a day or so I will measure a few cases for you.

cheers
Rinso

can I ask why the necked down version instead of the 6.5mm version??

There is plenty of info on that site that Dee Cee listed that says the 6.5x47 is flatter to 1000 than a 308 with less recoil etc etc.

I know I'm a bit of a 6.5 nut- but for F-class when BC and trajectory seem to this F-class novice to be so important- why go with the lower BC projectiles??

or do you already have 6mm tube??

later
P

My 6x47L has a .269" neck. Necked turned cases give me a little more confidence.

I settled with a stiff load of 2209 with 105 Lapua's for about 3100fps. Accuracy is with the 6br which is a tough ask.

A couple of mates and myself have tried the 6.5x47L for F Class. We cannot get this cartridge to group well enough to be competative. Too much verticle. I tried countless combinations, the best was with 120 mk's.

Cameron

G'Day Pat,
in the states with the 6x47 (or 6-6.5x47 in the US) they drive 107's at 3150 and beyond, so if the sierra ballistic program is accurate a 107 SMK @ 3150fps delivers the almost identical ballistics as a 6.5-284 driving a 142gn (Sierra?) match bullet @ 3000fps out to 1000yds. Probably with better barrel life too......

Plus I've got all the 6mm stuff from BR, the case is about the same size as Trev's 6-250, but "improved" if you like....... Small primer and flash hole and starting to place competitively well against the bigger 6.5's and 30cal's in 1000yd BR in the states. So its accurate enough. Berger, sierra, lapua and hornady bullets available in that weight range. So for F class it is one case for all distances I'm likely to contest

More importantly, 1hr up the road is a no-turn neck reamer or 5hrs up the road is a tight neck reamer. And the 1.9" case will fit nicely in the loading port of my Hall (2.5" long) and in a lighter rifle; recoil, bag disturbance, shooter fatigue are all lessened when compared to shooting a 6.5-284 in the same rifle weight.

Cases, dies etc are readily available and if I ever give up F class (unlikely) it would make a great medium varminter with 85gn pills.

Something to consider!

Cheerio Ned

ok-makes sense
thanks
P

From what I have read.... and it's only reading on the net as I have no experience with both calibres,
the 6.5x47L and 6x47L are both flatter shooting than the 308, no drama's there, it's a given.

The 6x47L shooting 105's will outshoot the 6.5 version shooting the 130's and 140's at the longs from 600 to 1000 yards. The 6.5 version apparently doesn't have enough boiler room to push the bigger pills to match its smaller brother.

I think if you are using the 120's in the 6.5 version everything is back in line. I'm not sure who is the victor from there on in, maybe someone else can let us know.

I have no hard and fast FACTS or websites or threads to back up what I have said so take my advice with a grain of salt. It is merely the general understanding I have come to know when speaking about the 6.5x47L and 6x47L.

As a side note, I was recommened the 6x47L over the 6.5x47L for F-Class Open by a well known gunsmith due to the longer ranges shot.....

dee cee

G'Day Dee Cee,
I've been watching with interest the progress of the 6x47 and it is starting to win/place in FO here in oz. If the accuracy is a little off the 6BR, the better wind drift is much better than the 6BR and at longer ranges the wind must be a major factor........and shooter ability too!

Cheerio Ned

I did a fair bit of research into the various 6mm's ie BR, Dasher, 6x47L, 6.5x55, 6.5x47L and the 6.5-284 when looking for a good calibre for the young bloke for LR BR.

Without boring you with detail I found that the 6x47L had the performance capability of the 6.5-284 out to 1K without being the barrel burner that the 284 version is. The 6 BR was well behind in velocity at the longer ranges and the Dasher is close but much more trouble when it comes to making cases (same for the BRX).

This left the 6.5x55 and the 6x47L .. the 6x47L does everything the swede does with less powder and is from memory a bit better overall.

Add the short case and bolt head size and I reckon its got a bucket load of potential. The minimal recoil is also a major bonus for the lad when shooting all day.

I was then discussing my choice with two other very good long range shooters who had both reached the same conclusion and are also building rifles in this calibre. When two blokes I have a great deal of respect for as top level long range shooters in Australia have separately reached the same conclusion as I did I figured I was on the right track.

As a result the 6x47Lapua was born and will be in the cupboard on Monday or Tuesday when I get the stock back from the painter.

For anyone who's interested its a 6x47 Lapua 270 neck throated for 105 Lapua sencar's, Stolle Panda LBLP, Jewell BR trigger, Shilen ambidextrous thumbhole stock, Lilja 3 groove 1-8 twist barrel, MOA rail and Kelby rings, Weaver 36T scope. I will post pics when I can maybe even tomorrow.

cheers
Rinso

sounds like you've got it all sorted, Rinso; goodonya, mate!
I'm jealous!!

Gday Ned,
Cannot give you a lot of info mate other than to say that,

An unturned case loaded with 107s etc the neck measures .2705", the few i have measured are about +/- .0003.

For unturned necks i cut the chamber neck to be .273"

Most neck turns, i cut the chamber neck to .270" and the shooter usually turns the necks to about .268".
cheers,
Shane

0.270" neck sounds about right for a new reamer, Ned!

And just remember, its "our Hall".

Dazz