175 SMK 1-12 twist

[winmag76]

Is any one shooting 175 SMK out of a 1-12 twist? I have factory 700 VS That shoots the 168'S good but was thinking about doing some 1000yd shooting. How fast do I need to shoot them and whats a good load to start with.

 

[jeffro]

We are shooting the 208 Amax out of a 1-12 twist with great results.

 

[longrange700]

what caliber are you shooting the 208 out of, mine like's the 175's better than the 168's and the 178 a-maxs even better, also what speed are you getting with the208's, I am shooting the 178's at 2740 and they shoot great.

 

[436]

I've used 175gr Mk's in a 1-12 twist before... they seem to shoot just fine from a longer barrel rifle {.308 Win}.. say 26" plus. I shoot a 27.5" inch in 1-11 right now using the 175gr Mk's they work great. For shorter barrel rifles, I like the 1-10 twist in fact I like the 1-10 twist Polygonal'..., from Pac Nor.
The load that works best for me is in .308 Win; 175gr. Mk, Federal 210M primer, Lapua brass, {43.5grs} RL-15'..., vel's 2650 fps with very low SD's.
436

 

[jeffro]

The 208s are comming out of a 26in 308WIN. Shooting RL-17 we are getting 2600-2675. The load that we are using is giving us 2630fps.

 

[436]

The 208s are comming out of a 26in 308WIN. Shooting RL-17 we are getting 2600-2675. The load that we are using is giving us 2630fps.

jeffro,
How'd you come up with those vel's on the 208gr. bullet... man that sure seems kinda high??
436

 

[jeffro]

RL-17 works great with the heavy bullets. There are people actually getting over 2700 with the 208s. We workded up to 2700fps but the the acuracy started to get worse. The COAL is just under 3.000in. Here is a good read on this subject.

308 Win, 208 AMax, RL17 - Sniper's Hide Forums

308Win, 208 AMax, RL17 - 24hourcampfire

 

[436]

jeffro,
Thanks for the sitrep on your load... I've got about 5 pounds of RL-17 which I was saving for heavy bullets in my 6XC; looks like I may give it a run with a few 208gr'ers in my .308 Win.
436

 

[jeffro]

The ballistic numbers will really shock you. Quite impresive out of the 308WIN.

 

[longrange700]

thanks for the info I am going to get some 208s and try them if I can get 2650 and accurate that would be a hammer on deer out there a long ways, I shot one with the 178 at 550 yards not a long ways but man it blew through it like no-body's business and left a huge exit the 208 would do just the same at like 700 yards.

 

[winmag76]

I wont to thank you guys for all the information. I just shot some 208'S with Varget an this is what I got. 46.5gr 2508fps, 47gr 2572fps with a small mark on the case, 47.5 gave me 2606fps with a slightly sticky bolt. I don't have any RL 17 but I would like to try it now I will see if it will shoot groups then I will have me a long range target load.

 

[longrange700]

what length barrel are you using I have alot of varget and hope I can find a load with it to get 2650 or so out of a 26'' tube.

 

[jeffro]

There is info out there using Varget. I think its a better powder than R-17 for 168s, but others have not got as high of velocity as you can get with R-17 with the 208s.

 

[winmag76]

I'm shooting a 26'' barrel rem 700 VS and my oal is 3.050 that's measured at the tip.