stout 8x57 220gr loads: caution max load exceeded

[ForneyRider]

Has anyone made a stout load for 220gr 8x57? Yes, I know I am asking for above max. recommended loads.

I am working on a load for 220gr Sierra Game King which have a pretty decent BC, but the Sierra accuracy load is about 2000fps(39-40gr Varget), not quite what I am looking for in a long range target load.

I've read that Nosler reloading book v4 has load data for a 220gr to 2600fps. I know they don't currently make a 220gr, and there is no load data for 220gr in 5th and 6th books. Does anyone have a copy?

I am about .5gr over max in my 200gr loads and got 2550fps and excellent accuracy. So I know it will be slow and tedious to get 2600fps from a 220gr load.

Can anyone recommend a powder that will not spike the pressure when going over max?

Please feel free to msg me your load data if you are uncomfortable replying to this thread. Much Thanks!

 

[NCsmitty]

I'm curious about what rifle that you're pushing these heavy loads through? I hope it's not an older Mauser that is only surface hardened in it's heat treat.
Nothing at the Hodgdon site is showing more than 2420fps with a 220gr Hornady SP, so IMO, you are treading into dangerous waters with your attempt at 2600fps with a 220gr SGK.
I'm guessing that you are loading 48gr of Varget under the 200gr bullet at 2550fps? I would think that you would be happy with that, if it doesn't cause your rifle to develop headspace issues over time.

You will need to go to a slower burning powder like H4350 or Imr4350 or perhaps Rel-17 or Rel-19 to give the 220gr a chance to excel. You'll need to contact Alliant for the Reloader powder's data.

Here's the reloadersnest site, but be cautious of some of the loads.

http://www.reloadersnest.com/frontpage.asp?CaliberID=78



NCsmitty

 

[ForneyRider]

Thanks Smitty. I have been on Reloader's Nest for some time.

The 'smith that changed the barrel has gone through the rifle thoroughly and we have discussed the loads with a component manufacturer. The brass and rifle are capable of Win 270 pressures which are 65k PSI.

 

[A Historian]

I think your goal will largely depend on your barrel length. You may be limited to a certain cap if you have the more common 23" barrel length. Trying to obtain 2600 feet-per-second would be more feasible with a 29" barrel.

If you're lucky enough, and careful enough, I think it's possible for you to obtain your goal. Just don't get too caught up with the velocity aspect - accuracy is what you're looking for.

I'll send you some of my data.