Leica Sport Optics.

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#4550726 - 10/31/10 03:19 AM Re: Who shoots the 6X47mm Lapua? How does it compare to the .243 and 6mm? [Re: 65BR]
keith Offline
Campfire Guide

Registered: 02/08/02
Posts: 4061
Heavies usually take over in the 400-450 depending on bullet weight, Light bullet BC, and speed.

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#4558386 - 11/02/10 09:28 AM Re: Who shoots the 6X47mm Lapua? How does it compare to the .243 and 6mm? [Re: keith]
woofer Online   content
Campfire Outfitter

Registered: 01/01/03
Posts: 7636
Loc: VT...
hunting though. you guys are all giving great reviews on heavy 30" tubes that make the lapua shine.. 22-23" tube sporter weight same twist. using your experience guesstimate reduced velocities and then compare them to the 243. say 105's.. maaaaaaybe 115's.

i ask because of the blank i have and both reamers available..

thanks

woofer
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#4558580 - 11/02/10 10:34 AM Re: Who shoots the 6X47mm Lapua? How does it compare to the .243 and 6mm? [Re: woofer]
VAnimrod Offline
Campfire Oracle

Registered: 04/21/04
Posts: 61128
Loc: gone
woofer;

FWIW, QL shows the 6x47L at 47.00 grains internal capacity, 2.800" COAL, and a (redlined) max charge (63kPSI) of H4350 at 41.0 grains (100% capacity) under a 105 A-Max for 3037 fps from a 22" tube.

Same (redlined) max charge of H4350 (63kPSI, 43.0 grains, 96% capacity) and 2.800" COAL for the .243Win and the 105 A-Max shows the estimate at 2993 fps from a 22" tube.

I'm not seeing the advantage, nor the difference, and would probably just AI the .243, load to 2.800", and run with it.

If I wanted "less is more" in the 6mm class, I'd look HARD at the 6mmBR or the 6PPC. The 6mmBR(Norma) should get you to 2800 fps-ish, with about 30-31 grains of RL-15, and the 6PPC to about 2600 with about 22-23 grains of RL-10x.

But, that's just me.


Edited by VAnimrod (11/02/10 10:37 AM)
Edit Reason: disclaimer: haven't run the x47s, nor the PPC, but am damned curious about them
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#4561462 - 11/02/10 10:27 PM Re: Who shoots the 6X47mm Lapua? How does it compare to the .243 and 6mm? [Re: VAnimrod]
EddyBo Offline
Campfire Guide

Registered: 10/28/07
Posts: 4210
Loc: SW MS
Try running max+ loads through both of the hypothetical rifles considered above multiple times and you will see some small advantage. The large primer pocketed cases will start to become extremely loose even to the point of leaking gas. The smaall rifle primered cases will still be tight. Not a real advantage unless your shooting f-class. When you fire 66 rounds per match it is nice not to have to prep new brass every month.

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#4562009 - 11/03/10 06:46 AM Re: Who shoots the 6X47mm Lapua? How does it compare to the .243 and 6mm? [Re: EddyBo]
VAnimrod Offline
Campfire Oracle

Registered: 04/21/04
Posts: 61128
Loc: gone
Eddy;

True, but woofer is looking at a LW hunting rifle, not a bench gun, thus the hair-splitting.
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#4562480 - 11/03/10 09:24 AM Re: Who shoots the 6X47mm Lapua? How does it compare to the .243 and 6mm? [Re: VAnimrod]
65BR Offline
Campfire 'Bwana

Registered: 02/22/07
Posts: 11660
Loc: NW Louisiana
My 6BR - last 26", 8t, ran 105s at 2850. Figure 8-12fps per 1" cut. BRX - 'ai' runs around 2950 in similar bbl. The 47 should run around 3,000-3050 in a 22-23" hunting rifle w/105s.

Above assumes safe accurate loads, not 'all out primer pocket loosening loads.'
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#4563413 - 11/03/10 02:50 PM Re: Who shoots the 6X47mm Lapua? How does it compare to the .243 and 6mm? [Re: VAnimrod]
EddyBo Offline
Campfire Guide

Registered: 10/28/07
Posts: 4210
Loc: SW MS
Originally Posted By: VAnimrod
Eddy;

True, but woofer is looking at a LW hunting rifle, not a bench gun, thus the hair-splitting.


Yea under those parameters I would take the 243AI there is not much much diffference unless your shooting high volume. I just debated im my mind what to chamber a new brux 6mm interrupted fluting sendero contour barrel in. I have reamers for 6x47, 6x284, and 243 and 243AI. I decded that I could not go wrong with 243AI. Now just to decide what action and stock to use. I am thinking just a trued 700 in a HS stock. I have decided to use the defiance action and McMillan HTG I had earmarked for this barrel with a Rock creek ABS that arrived the other day. My stable of 6mms is getting unmanageable. I think I am going 243AI with both but may change my mind and do one in 6x284.

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#4563619 - 11/03/10 04:09 PM Re: Who shoots the 6X47mm Lapua? How does it compare to the .243 and 6mm? [Re: EddyBo]
woofer Online   content
Campfire Outfitter

Registered: 01/01/03
Posts: 7636
Loc: VT...
what about mag length restrictions with the bigger 6's? any benefit to running the shorter BR cases or L? no fireforming is fun. i am not afraid to buy brass. just wondering if i am leaving anything on the table by wandering away from the 243...

thanks!

woofer
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#4563677 - 11/03/10 04:29 PM Re: Who shoots the 6X47mm Lapua? How does it compare to the .243 and 6mm? [Re: woofer]
woofer Online   content
Campfire Outfitter

Registered: 01/01/03
Posts: 7636
Loc: VT...
another thought. do these rules apply to the 6.5 also or the larger bullets eat up horsepower to the point that the benfits befall the 08' case?

thanks

woofer
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#4563949 - 11/03/10 05:45 PM Re: Who shoots the 6X47mm Lapua? How does it compare to the .243 and 6mm? [Re: woofer]
7_08FAN Online   content
Campfire Regular

Registered: 12/27/03
Posts: 1207
Loc: Kansas
I built mine for hunting. It has a ten twist barrel cut at 22". I shoot 85gr Sierra HPBT's and it is a tack driver. One downside is the lack of data. I have not used mine alot, but have killed four hogs with it. None took a step.
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