Playing with subsonic.308 win

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 🤔

 

[One on top of two]

1 hour ago, saddler said:

Has anyone made a clone of the Lapua Subsonic .308 factory ammo?

I’m working on it 👍

the subs are good fun, I shot them today out to 150 yards. My favourites ATM have to be the 167 Lapua scenar. I can twang steel out to 300 m and still get a very satisfying DONG ! 
and of course you have the added benefit of no one hearing you having the time of your life 😂

[Miseryguts]

9 hours ago, One on top of two said:

the subs are good fun, I shot them today out to 150 yards. My favourites ATM have to be the 167 Lapua scenar. I can twang steel out to 300 m and still get a very satisfying DONG ! 
and of course you have the added benefit of no one hearing you having the time of your life 😂

Hi, just as a matter of interest, what drop are you allowing at 150 and 300, and what is your zero distance? I am developing a subsonic load using green dot and  H&N 165gn RN and getting good results at 50m as per your picture, but the crap weather is stopping me getting out to my ground to try longer ranges

M very damp round the edges in Monmouthshire

[One on top of two]

5 hours ago, Miseryguts said:

Hi, just as a matter of interest, what drop are you allowing at 150 and 300, and what is your zero distance? I am developing a subsonic load using green dot and  H&N 165gn RN and getting good results at 50m as per your picture, but the crap weather is stopping me getting out to my ground to try longer ranges

M very damp round the edges in Monmouthshire

i zero @ 50 m 

below is my drop chart .

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Distance, yards	Bullet speed, f/s	Energy, ft-lbf	Vert. correction, MRAD	Hor. correction, MRAD
100.0	999.9	388	1.8	0.00
150.0	982.2	375	4.0	0.00
200.0	965.8	362	6.3	0.00
250.0	949.7	350	8.8	0.00
300.0	934.3	339	11.3	0.00

[Miseryguts]

Interesting figures - I can see the vertical figures being thereabouts, but the loss of velocity over 300 yards is excellent. I assume this down to the superior BC of the bullet you are using.

Unfortunately I cannot chrono velocty at distance, only at muzzle - I assume you have a LabRadar(sp?) set up.

Managed to get out between the showers earlier and shoot some rounds off over my cheapo chronometer and get a target at 56 yards(maximum safe distance in the drive to my house - we have no neighbours within a mile or so)

Chrono figures are: 24 shots Average MV 1049,Velocity Spread 38, Sd 8

Target below is 9 shots

Load is 7.0gr Green Dot over 165gr H&N RN, PPU brass, CCI 200 primer, COAL 2.645 for jump to lands of 30 thou.

Need a break in the weather to get out to my 100/200 yard range - provided it is not still flooded

M  a bit happier in Monmouthshire

 

 

[One on top of two]

2 hours ago, Miseryguts said:

Interesting figures - I can see the vertical figures being thereabouts, but the loss of velocity over 300 yards is excellent. I assume this down to the superior BC of the bullet you are using.

Unfortunately I cannot chrono velocty at distance, only at muzzle - I assume you have a LabRadar(sp?) set up.

Managed to get out between the showers earlier and shoot some rounds off over my cheapo chronometer and get a target at 56 yards(maximum safe distance in the drive to my house - we have no neighbours within a mile or so)

Chrono figures are: 24 shots Average MV 1049,Velocity Spread 38, Sd 8

Target below is 9 shots

Load is 7.0gr Green Dot over 165gr H&N RN, PPU brass, CCI 200 primer, COAL 2.645 for jump to lands of 30 thou.

Need a break in the weather to get out to my 100/200 yard range - provided it is not still flooded

M  a bit happier in Monmouthshire

 

 

Nice 👍

I use a magneatospeed V3 . 
I do lots of varminting  so for me the V3 has the edge over the Labradar as I can set up in 2 mins in the feild before I start , check MV and my Data/Drops are ready to go  .