bet sub sonic combo for 500 yards ?

[myrifleisLapua]

been looking into a lot of sub sonic info lately . What would be the best combo for lobbing heavy pills out to 500 yards or so for steel ? looking at this bullet
for the 458 socom GS CUSTOM BULLETS - 458566SP195 Technical Data
only thing I read that a longer throat would affect accuracy if you wanted to shoot factory ammo . also in a bolt gun is there any problems pushing the socom past 35k psi if you wanted ? I was interested in the 520 whisper but I read it wont feed from a aics mag because of the .510 bullets ? according to gs that 566gr bullet can be load with the length of the 458 socom case to a oal of 2.825

 

[MudRunner2005]

300 AAC Blackout with a 185-200gr bullet might work alright out to that distance.

 

[myrifleisLapua]

thought about it but I read wind is hell on the 300 blkout at 500.
I think it drifts 9 moa with a 10 mph crosswind . from what I read getting
barrels for the socom is a pain in the @$$ . looked at something short like the 450 marlin but it would need a long action for the feeding from a dbm. a lot of the chassis I like are short action only right now becaue their filling those orders first before making a run of long actions chassis in rem 700. I asked ssk about the 510 whisper to see if they had brass for it. its impressive with the amax out to 500 yards

 

[MudRunner2005]

.35 Whelen would put the stomp on something big out to about 500 yards.

 

[myrifleisLapua]

probably any of the 35s would 338 federal etc but I want something different and big. ssk just got back to me they said brass for the whisper is 5.50$ a case from lapua brass. though they may have meant 5.55$ a cartridge because she said a round not a case .

 

[Canadian Bushman]

Have you considered a 338-08?

 

[MudRunner2005]

Have you considered a 338-08?

That's the same thing as the .338 Federal.

.338 Federal can send a 210 @ 2600 fps MV.

 

[myrifleisLapua]

well I might get something from ssk.
leaning towards the 50 American eagle is a 50 AE case straight walled to .510
to take 50 bmg projos and launch them at sub sonic speeds . brass would be easier to make than for the whisper .

 

[Canadian Bushman]

That's the same thing as the .338 Federal.

.338 Federal can send a 210 @ 2600 fps MV.

Sorry i had my head up my a££

 

[MudRunner2005]

Sorry i had my head up my a££

It's cool...You were more right than you know. The .338-08 was around long before the .338 Federal. So, you were on the money, but it's easier to find dies for a .338 Federal. I'm not sure of the similarities and differences. I do know the .338 Federal is a wildcat form of the .338-08.

 

[Canadian Bushman]

It's cool...You were more right than you know. The .338-08 was around long before the .338 Federal. So, you were on the money, but it's easier to find dies for a .338 Federal. I'm not sure of the similarities and differences. I do know the .338 Federal is a wildcat form of the .338-08.

Hmmm. Im gonna research this. Thanks

 

[Bravo 4]

I just went down this road. I ended up with my own version of a .510.
I piggybacked off what someone else had done with the longer ultra mag cases. When I called them to have one of their barrels made I was told they no longer do them and they don't even have a reamer any longer. So I had my own made. I had also conversed with SSK a couple times about a .510 Whisper and I liked that guy's attitude so much I decided not to work with him.

 

[myrifleisLapua]

yeah he certainly has a "personality" that one lol
. I think I will just wait and see when the long action chassis I want comes out
seen a thread on here about a 470 capstick now that looked fun gun).
loaded rounds for the 510 whisper would probably be like 10$ a round don't think so.
I don't have any money right now so I have time to decide

 

[Bravo 4]

The brass for the .510 Whisper is gonna cost ya. 338 Lapua cases aren't cheap, then add in the machining work. I have a buddy that works at Remington and got me a supply of 300 RUM cases for cheap, so I really don't know what they are going for. Then I got a couple hundred pulled .50 BMG API projectiles from a supplier for $0.50 per. If I use 750gr Amax or Lehigh Subsonic bullets they will cost about $2 a piece. The Amax has a BC so high that out to the 500 yards you want you lose less than 100 fps velocity, the wind drift is minimal and it'll still hit like a hammer. Plus if I ever want to hunt Blue Whale I can push the velocity to over supersonic speeds.
As far as actions go, mine is built on a Savage long action. However I would have to push the long BMG projectiles really far into the case to get them to load into the magazine. So far that I might as well have made the chamber shorter. Not a problem with the straight walled case, just wouldn't have ran the reamer in as far. Mine will load shorter bullets into and feed from the mag, but I don't care if I have to run it single. I do it with my .338 Edge.