Never ending 308 load tests

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VinceMarksman

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Been testing loads like what feels forever with my tikka t3 varmint 308 lately.

Found a nice load with 168 AMAX in winchester cases.

Stepped up to lapua cases and tried 175 sierra tipped match king. Did 2 ladders and need further testing but these bullets are hard to find so I ordered 3 boxes of 175 SMK to start new tests.

I guess my question is 2 fold: think the 175 SMK can be a sweet go to bullet for 100y paper puching up to 800y steel and more importantly, think I can attend an ELR with the 175 SMK? It would be 1000-1400 and up to 2000m. I know I won't reach 2000m with my 308 but I'd like to reach the 1400m mark. I am looking at the Berger 185 OTM jugg bullet, it would fit my barrel twist nicely according to Berger website and would be a little heavier to tried and reach 1400m.

What you guys think?
 
from. accurate shooter

Kevin Chou Rifle Specs
BAT Machine M action, RB/RP
Bartlein barrel 300×308 1:10″ 5R Heavy Palma 29” finished
Jewell trigger
Robertson Composites stock (Warner model)
Nightforce NXS 5-22×56 with mirage cap by Kreativ Solutions
Duplin bipod
Edgewood Mini Gator Rear Bag, extra short, slick ears

Will Chou Rifle Specs
Stolle Panda F-Class, RB/RP
Bartlein barrel 300×308 1:10″ 5R Heavy Varmint 30 1/2” finished
Mike Ezell Tuner
Jewell Trigger
Master class stock (Warner model)
March Tactical 2.5-25x52mm with modifier disk
Duplin bipod
Edgewood Mini Gator Rear Bag, extra short, slick ears
 
I shoot 185 OTM Jugg over Varget with CCI200 primers in Lapua brass for a speed of about 2580 fps. I'm seeing about 37 MOA drop at 1050 yards. My calculator tells me that same load at 1400 yards would need about 68.5 MOA of drop. If you've got the scope adjustment/bases, you could lob them out there. That would be nearly 80 feet of drop! (Rough calculations)
 
manitou210 said:
from. accurate shooter

Kevin Chou Rifle Specs
BAT Machine M action, RB/RP
Bartlein barrel 300×308 1:10″ 5R Heavy Palma 29” finished
Jewell trigger
Robertson Composites stock (Warner model)
Nightforce NXS 5-22×56 with mirage cap by Kreativ Solutions
Duplin bipod
Edgewood Mini Gator Rear Bag, extra short, slick ears

Will Chou Rifle Specs
Stolle Panda F-Class, RB/RP
Bartlein barrel 300×308 1:10″ 5R Heavy Varmint 30 1/2” finished
Mike Ezell Tuner
Jewell Trigger
Master class stock (Warner model)
March Tactical 2.5-25x52mm with modifier disk
Duplin bipod
Edgewood Mini Gator Rear Bag, extra short, slick ears
Click to expand...

Kevin Chou Load Data
Berger 200 Hybrids, .010″ jam
Hodgdon Varget, 44.2 grains, 2660 fps
Lapua .308 Win Palma brass, skim turned to .0145″, .002″ neck tension.
CCI BR4 primers

Will Chou Load Data
Berger 200gr hybrids, .010″ jam
Hodgdon Varget, 44.2 grains, 2660 fps
Lapua .308 Win Palma brass, skim turned to .0145″, .002″ neck tension.
CCI BR4 primers
 
cbh560 said:
I shoot 185 OTM Jugg over Varget with CCI200 primers in Lapua brass for a speed of about 2580 fps. I'm seeing about 37 MOA drop at 1050 yards. My calculator tells me that same load at 1400 yards would need about 68.5 MOA of drop. If you've got the scope adjustment/bases, you could lob them out there. That would be nearly 80 feet of drop! (Rough calculations)
Click to expand...

awesome!! Do you jam those bullet?

Im having 55 MOA on my scope and 24 MOA of holover for a total of 79 MOA
 
I have helped several shooters years back reach out with 175MK/308 tactical rifles. The funny thing, some made it to around 1400yds, some didn't. We could never understand why given the specs were very similar in the barrels. I have not shot the TMK that far but there is only 1 way to find out.

The Nosler 175gr RDF is another worth trying. Their shape is very low drag. I have shot the 22cal and 6mm and so far, short range accuracy has been great.

wrt to the Juggernaut, definitely high on my list for this type of application. They fly very well to 1000yds and are very common in FTR competition. Their shape suggests they should go transonic/subsonic well. And if they do, then you just need to keep adding more up.

With the focus on that 1000yds target, I really haven't shot alot of these bullets beyond 1100yds. I hope to do more of that this summer and just see what can reach out.

There are a number of very high BC bullets that are designed for super sonic flight and may not do well once speeds slow down. Twist, ambient conditions will determine the final result and there is only 1 way to find out.

So go shoot some way out there and monitor how the bullets does at 1700fps, 1400fps and 1000fps (use a ballistics program to help indicate the distance these speeds are likely to happen). I have found that if a bullet is going to react badly, it will do so in these 3 speed regions.

If a bullet gets to 1000fp and sub sonic, the bullets will continues its flight as far as elevation and terrain allow. It will be very obvious if a bullet doesn't want to go subsonic.

Jerry
 
VinceMarksman said:
awesome!! Do you jam those bullet?

Im having 55 MOA on my scope and 24 MOA of holover for a total of 79 MOA
Click to expand...

yes I jam 0.005" in to the lands. They performed best for me with a bit of jam. I might suggest looking at a 20 or 30 moa base if you're going to regularly shoot that far. You might find that holding over 24 moa gets old quickly. As well, pushing scopes to the limit of their adjustment does not always make for consistent adjustments (of course depending on quality of scope you employ). I also just noticed you were talking in meters and I was talking yards, so you're going to look at more drop than I calculated. 1400 m = 1530 yards
 
thank you

I already have a 20 MOA base which leaves 55 MOA after zeroing on my burris XTR 5-25 scope.

For the berger 185, should I try a small quantity first to makes sure my rifle likes them or is it a sure bet with my tikka?
 
hard to say, every rifle likes different things, including factory rifles that are "identical". If it were me, I'd buy enough to do some load testing then decide if I wanted more. Around here they are about $82 / 100 after taxes so I personally wouldn't stock up until you know they'll work to your expectations.
 
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