F open calibres, what's dominating?

Get or give advice on equipment, reloading and other technical issues.

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DaveMc
Posts: 1453
Joined: Mon Aug 22, 2011 6:33 pm

#16 Postby DaveMc » Fri Oct 07, 2011 6:32 am

Looking at the whole range of new hybrids is exciting. 6, 6.5, 7 and 30 cal.

Also what is important is as they are made on thick jackets, they have a large meplat. Therefore pointing makes a big idfference. Bryan Litz claims an 8% reduction in drag from pointing the 180 7mm hybrid. (possibly more for 6 and 6.5)
With an already incredible 0.345 G7 ( 0.674 G1) going to somewhere around 0.370+G7 or nearly .730 G1 7mm is still going to be a force for some time to come. But every cal is up for an improvement and as Alan said, 30 cal will see the biggest.
Personally my choices are same as Cameron as well but find myself regularly reaching for the 284 Sh in anything even slightly twitchy now.

Seddo
Posts: 555
Joined: Sun Sep 21, 2008 5:56 pm
Location: Latrobe Valley

#17 Postby Seddo » Fri Oct 07, 2011 9:14 am

AlanF wrote:Looking ahead, Berger has just released a 230gn 30 cal with G7 BC of .364 (c.f. 7mm 180 G7 .337). This is going to make 30 cal an attractive proposition, so my prediction for the future is more 30 WSMs on the mound, and for the real masochists, the bigger 30 magnums.

Alan


I hadnt seen teh new bergers, i will pick up a box and see how they go.

I picked up a box of the new hornady 225gr Match projies but havent got around to trying them yet. People are saying they can get them up to 3000fps in a 300WM.

Scott
----------------------
Seddo

Moe City Rifle Club

bruce moulds
Posts: 2900
Joined: Sun Jun 19, 2005 4:07 pm

#18 Postby bruce moulds » Fri Oct 07, 2011 5:40 pm

bat,
the 6.5 lr with an 8" twist will chew up the 6mm version & then spit it out.
and do it with better barrel life.
it's not too late for you to change.
bruce.
"SUCH IS LIFE" Edward Kelly 11 nov 1880
http://youtu.be/YRaRCCZjdTM

BATattack
Posts: 1284
Joined: Mon Dec 29, 2008 10:29 pm

#19 Postby BATattack » Fri Oct 07, 2011 8:41 pm

why do you say that bruce? i doubt ill get one in the near future as i allready have enough in the safe gathering dust at the moment! i think the load data that is out on the 6 SLR is a bit under rated but time will tell. :wink:

bruce moulds
Posts: 2900
Joined: Sun Jun 19, 2005 4:07 pm

#20 Postby bruce moulds » Fri Oct 07, 2011 9:10 pm

hi bat,
b.c. and expansion ratio.
bruce.
"SUCH IS LIFE" Edward Kelly 11 nov 1880

http://youtu.be/YRaRCCZjdTM


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