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This is a discussion on New filly in the stable to feed within the Reloading forums, part of the Firearm Forum category; Just bought a Gunsite scout rifle. It is my only .308 and I've ordered dies and brass. I wasn't sure what powder works well in ...


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Old July 16th, 2016, 02:13 PM   #1
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New filly in the stable to feed

Just bought a Gunsite scout rifle. It is my only .308 and I've ordered dies and brass. I wasn't sure what powder works well in it. I already have IMR 4350, IMR 4064, bl(C)2, H4198, and 748. There seems to be two schools of thought with this caliber, one being faster powders like Varget moving large bullets at moderate velocities, the other suggests medium burners pushing bullets between 125 and 180 grs. in the 2600 +fps range.
Is this more dependent on barrel length? I tend to lean in the direction of IMR4064 and 150-168 bullets, but I'm an old guy, with a more traditional approach. I would like to take advantage of the experiences of some of the forum members, and eliminate some of the learning curve with this cartridge.




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Old July 16th, 2016, 08:50 PM   #2
 
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I don't believe barrel length has anything to do with powder choice . . . the powder that pushes a bullet fastest out of a 26" barrel will push it fastest out of an 18.7" or 16.1" barrel.

Your best bet may well be to start with IMR4064 since you have it. If you want, you can try a box of Federal Gold Medal Match in 168 or 175gr first to get an accuracy reference point. I believe the charges are 42.8gr and 41.8gr respectively if using Federal cases. Since both use Sierra SMKs and IMR 4064, you can go from there to try and beat them.

A lot of folks swear by Varget, personally I swear at it - never could get a load that was better than the two I mentioned. But that was probably just me and my Czech rifle

IMR 4350 is fine for 30-06 but a bit too slow for 308. Don't know the others you mentioned for 30 cal.

FYI for my 308 I use IMR4064 + Sierra 168 SMKs and N140 + Lapua 167gr Scenars, both in Lapua brass. The Scenars hit steel for me out to 940yds which was as far as my scope would allow elevation + holdover. For 30-06 I recently switched from SMKs to the new 175gr TMKs (much better BC) + IMR 4451 (less temperature sensitive) with great success out to 1200yds, and will be trying the 175gr TMKs in 308 next to see if I can't consolidate bullet inventory. You might want to try the 175 TMKs + IMR4064 or the new Enduron powder IMR4166 (less temp sensitive than IMR4064).

But it all depends on how you want to use the loads. What do you plan to do?
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Old July 17th, 2016, 10:32 PM   #3
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The philosophy of use for this rifle will be close to mid range deer and pig hunting. As I live in the upper Sacramento valley, I'll be hunting rolling Oaks grassland. Most hogs are 150 yds or less, sometimes much less(30ft). Deer are coastal blacktail and occaisionally a mule deer hybrid(in the Sierras). most deer are encountered at 50 to 150 yds.
Coyote can be encountered at 100+ , but only on occaision, I don't hunt them
with a .308, my .223 is usually what I use on intentional hunts.
4064 will be my first powder to try and probably a 168 gr . I'll post my paper results.

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Old August 13th, 2016, 10:36 PM   #4
 
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Hard to beat the older traditional 4895(I like H4895) and for most deer hog shootin 150s will be fine. 165s at the most. Only hunting type 308 I have is a neat little ol Rem 788. The other 2 are An Armalite AR-10 and an ol M-1A. They both get military type ammo... some loaded with Soft points. Don't shoot match bullets at all... not real great for hunting ammo. Shot one deer with the ol M-1A. Worked but too heavy to hunt with...LOL
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Old August 14th, 2016, 06:01 AM   #5
 
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Any good 150gr bullet your pick, and Varget, I would also look at H4895, IMR8208XBR. It will do it all, and if you drew a elk tag take it.
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Old August 14th, 2016, 02:21 PM   #6
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My .308 bolt gun had used a lot of IMR4064 (I wasn't able to find any "better" 308 powder so I used what I had on hand). With Hornady 155 A-Max bullets I get 1" at 100 consistently with an occasional 7/8" group. Tried some Sierra "hunting" bullets and got slightly bigger groups, 1"-1 1/8"...

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Old August 22nd, 2016, 04:15 PM   #7
 
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BL-C(2) meters really well in my Dillon press. I shoot a AR-10 with a 16" barrel so I stick with the 150-168gr bullets. I have also used CFE-223 with good results as well.
With the short barrel you will not need a premium bullet since the short barrel won't develop enough velocity to cause failure.
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