6.5x47lapua load developement advice

[atlanticity]

Any advice regarding which load to try first.The choice is 123 grain scenar or 139 grainscenar.Mainly for 1000yard target at Bisley.Should I chase velocity with the 123,s or bc value with 139,s.The rifle is a Dolphin,nesika action and Bartlein 30 inch barrel with a 8.5 twist I think.My gut feeling is 139 what does any one else think and why?Thanks for your replies regards Jonathan

[John MH]

139 Scenar is a big heavy bullet for a 6.5x47 case

[Tuck]

The cartridge was deleloped for 120-130g bullets but obviously that doesn't mean you can't use the 139's but Iv always used the 120's in mine with good results.

[TJC]

You chase BC for known distance shooting to help mitigate wind drift. The higher velocity tends to work better / shoots flatter which is more optimal for UKD shooting as it is more forgiving with vertical dispersion. I shot the 139gr out to 1200 at Bisley a couple of weekends ago. Both will work, choose the one that better suits your application.

[gbal]

As TJC, let the rifle decide,though Higher BC for serious distance is a general guide-to 300y or se,fps has the edge (extremes excepted of course) Here is some 260 data for SAAMI loads (6.5 x 47 will follow quite closely,but no commecial comparable loads. SAAMI so that pressures etc are known,and standard... drop/drift 10 mph wind 24 inch barrel.

 

Fed120 NosBT@ 2950BC .418 200y 0/3 300y 7.1/7.0 400y 20.8/13 500y 42/21 600 73/32 800y171/63 1000y336/107

 

Rem120AcTip@2890 BC.48 200 0/2.7 3007.2/6.2 400 21/11.5 500 42/19 60072/28 800 164/54 1000 314/91

 

Fed 140SGK@2700 BC.415 2000/3.4 300(/8 400 25/15 50052/25 60090/37 800 212/72 1000 417/122

 

Nos 140Part BC .490 @2800 2000/2.7 300 7.7/6.4 400 22/12 50045/19 600 76/29 800 174/55 1000 332/93

 

 

So,reasonably comparable-it's what is available on a level playing field.

Effects of both bullet weight and BC can be gleaned.BC clearly reduces wind drift at 1000-as expected.

The detailof course is 260 see above-but close

Hunting loads don't matter given weight,MV and BC are compared

 

 

 

It's close enough anyhow as a guide. Precision is a function of bullet-barrel interaction,and that isn't generalisable.

Accuracy adds in shootability (the shooter) but recoil etc won't be much different in thse loads.

 

gbal

[atlanticity]

Thanks guys for your comments ,l have got the 139,s now so I shall give them a go and see which accuracy nodes develop and at what velocity.Thanks everyone Jonathan

[Dorset Winmag]

Jonathon,

 

I'm getting good results with both the following loads:-

 

Lapua Scenar 123 with 37.5 grains of RL15 behind giving an avg fps from a 26" Lilja of 2868

Lapua Scenar 139 with 37.8 grains of N550 behind giving an avg fps from the above barrel of 2800

 

Both are sub 0.5moa at 100m and were chrony'd on a warm day!

 

The rifle is a Barnard 07 built by Mik at Dolphin.

 

Hope that helps!

 

DW

[Borisserge]

This is something that we have been trying out in 1K bench comps.

You should consider trying 142smk. if you can get them to stabilise....

There is approximately just over one minute of wind gained over 139gr scenars at 1k. (This was with a 6moa wind)

If you are okay using a double base powder try RL17. There is a big gain in speed over N550.

Tbh, a single base powder gets you to 1k without excessively scorching the barrel.a

[atlanticity]

Hi Guys thanks for your replies.Ive been using n150 the velocities have got to about 2830 fps with 139 gn scenars but the groups were opening up and the extreame spread also increased.The primers also flattend and craterd.The best groups were around 2750 fps with extreame spread of 12 fps so I shall setle for this.Im wary of using those double base powders.I hve yet to shoot this load at 1000yrds but I hope the groups match the 100yrd groups of 0.4 moa,we shall see.Oh yes all loads were just touching the lands and the powder increments were in 0.5 grn intervels.Once I have have got a feel for the rifles performence I shall experiment with changes of charge weights of 0.1 grains to see if I can refine those groups.Thanks for the input and If you have any more insight please let me know regards Jonathan

[Brillo]

Almost the same as Dorset Winmag except using 39.9 grains of RL17/Elcho17/RS60 (all the same powder) with 139 grain Scenars.

This is obviously dependent on your COAL and mine is 2.680".

[Berserk]

The load I used in a previous 6.5x47 was;

 

38.9gr N540

123gr Amax

3002fps

 

This was basically at Vihts max load and was about as high pressure as I wanted to go!

 

I will be having another one made later in the year but want to use 140/142gr pills. will update once done.

[Swarovski1]

I am wondering at what is the general seating depth off the rifling for this cal.got my hands on mine tonite briefly.

[Spielvogel pointers]

Mines 8tho back using N140 and 123 Amax, it's not a fast load at just short of 2700fps but out of my 18in tube it's plenty for my needs

[Dorset Winmag]

I'm going .010-.020 off the lands. Its a very "forgiving" cartridge

[FGYT]

Mines 8tho back using N140 and 123 Amax, it's not a fast load at just short of 2700fps but out of my 18in tube it's plenty for my needs

 

 

for Deer loads Im getting 2690fps with 130gn Serria GameKing Hollow points with R15 in my 16.5" barrel havent tried any lighter bullets (140gn soft point is 2450fps with RL15)

[Spielvogel pointers]

for Deer loads Im getting 2690fps with 130gn Serria GameKing Hollow points with R15 in my 16.5" barrel havent tried any lighter bullets (140gn soft point is 2450fps with RL15)

 

Not worked up a deer legal load yet but was thinking of using 123grn sst and hopefully they won't be far different

[Spielvogel pointers]

Stammered on the post key sorry

[atlanticity]

Hi guys Ive been seating the 139 scenars to coal of 2.7110 I cant say this is jamed but if seated longer it will be pushed back to this value by the lands if chambered and with a neck tension of 0.001 with virgin lapua brass,regards Jonathan.