308 - 175gr SMK in a savage ??

[mwroseberry]

My 168gr SMK run great through my rifle. I can cover my 5 rd group with a nickle as you can see in my sig. I want to go to 175gr for longer ranges and to help buck the wind a bit. I shot my first two sets of test loads today using R-15. My 5 round groups were about 1.1" with a flyer in each group. I loaded using 37.5 and 39.5gr. I know my rifle usually likes slower speeds and has a 1/10 twist.

For those of you running this combo in a savage what grain weights are you running? Just trying to get a better idea before I waste any more rounds.

Thanks,
Merritt
SGT USMC vet.

 

[One_Man]

Re: 308 - 175gr SMK in a savage ??

Too slow. Max with RE-15 should be around 44gr depending on brass.

I shot 42.2 RE15, Lapua brass, 210m, 175 smk, 2.820" COAL out my 10FP, 1/2 moa

Start at 40gr RE-15 and work up.

 

[Suasponte]

Re: 308 - 175gr SMK in a savage ??

Terry

 

[mwroseberry]

Re: 308 - 175gr SMK in a savage ??

Sierra's chart says that's dangerous. Are your barrels showing any signs of damage or are you getting any split necks on your cases?

Here is the Sierra info sheet.

http://www.6mmbr.citymaker.com/f/Sierra308Win.pdf

Thanks,
Merritt
SGT USMC vet.

 

[Queequeg]

Re: 308 - 175gr SMK in a savage ??

I think it's safe as I'm running 43.8 grains of RL-15 under 175 SMKs and Nosler HPBTs as well as 178 AMAXs and HPBTs with no obvious signs of adverse pressure.

Alliant shows a max load of 45 grains under the 180 grain Speer Spire point,

http://tinyurl.com/2fx2dfj


I run this load in two different Savages (both 1:10 twists), an SPS (1-12") and an AR-10 (1-11.25") No problems yet! Keep in mind the warning of our own Greg Langileus that cummulative overpressure loads will catch up with us all. Not something to take lightly.

 

[ChrisGarrett]

Re: 308 - 175gr SMK in a savage ??

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Parkincense</div><div class="ubbcode-body">Too slow. Max with RE-15 should be around 44gr depending on brass.

I shot 42.2 RE15, Lapua brass, 210m, 175 smk, 2.820" COAL out my 10FP, 1/2 moa

Start at 40gr RE-15 and work up. </div></div>

I have to go with this guy.

I shoot a '05 LE2b with 26" tube. I think I started at 2.835" (beginning) and can now go (3000 rds.) out a bit farther.

Chris

 

[One_Man]

Re: 308 - 175gr SMK in a savage ??

Sierra's loads are notoriously light. You can load RE-15 just like Varget but subtract 1 grain. For example, if your Varget load is 43.5gr, then your RE-15 load would be 42.5gr. But don't assume anything. Work up from a safe starting point.

 

[Conrad]

Re: 308 - 175gr SMK in a savage ??

43.5 gr of H4895 isn't a bad option either...

 

[mwroseberry]

Re: 308 - 175gr SMK in a savage ??

Thank you all for your responses.

 

[Enios]

Re: 308 - 175gr SMK in a savage ??

43.6 of RL-15 works the best in my 10FCP with 1/10.but 44.8 of Varget works better in Winchester cases for me.

 

[BCP]

Re: 308 - 175gr SMK in a savage ??

42.5 behind a 175 should be a good place to start, I think that was the RL15 charge weight for the m118 round. Varget I use 42.5 in mil and 45 in win.

 

[locked&loaded]

Re: 308 - 175gr SMK in a savage ??

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Enios</div><div class="ubbcode-body">43.6 of RL-15 works the best in my 10FCP with 1/10.but 44.8 of Varget works better in Winchester cases for me. </div></div>

How far are you off the lands?

 

[Emilio]

Re: 308 - 175gr SMK in a savage ??

I run 43.1 RL-15 in Lapua shells.

 

[longebow]

Re: 308 - 175gr SMK in a savage ??

I just helped a buddy develop a load for his 110FP in .308:

Sierra 175 MK
Federal cases, fully prepped
43.6 grains N140
COAL 2.860
Velocity in 90 degree weather: 2650 fps

 

[Enios]

Re: 308 - 175gr SMK in a savage ??

2.815 which is .005 in winter 2.810 in summer. That's in Lapua Brass with 210M primers. I up it .3 grains in Winchester brass. Big thing is I try to hit around 2700fps and it works out for me. I've got the HS precision model with a SSS trigger set at 1 lb with a 12 X 42 Nightforce NX.