Fast 308 Winchester Load

[Guy Miner]

Link to an article and video I recently did for Gavin's website as well as his YouTube channel. Yes, there's both a written article and a video. We're talking a quarter inch group and 3150 fps.

https://ultimatereloader.com/2021/10/07 ... ter-loads/

Regards, Guy

 

[Charlie-NY]

Good article Guy. Nothing wrong with light bullets in the 308Win.

I've been shooting the 130gr Barnes TTSX with Benchmark for some time now. I get 3,130 ft/sec from the 22" Broughton barrel with surprising accuracy. It's not unusual to drop 3 bullets into a sub 2" cluster at 400yds. A frontal shot on an 8 point buck at 200yds dropped him like a brick. Fastest kill I've ever seen.

 

[JD338]

Guy,
Nice write up and video. You definitely know the 308 Win. I have dabbled with a couple of 308s but that may be changing. I will have to get with you when the time comes.

JD338

 

[Guy Miner]

Thanks Jim, ya, I love the good ol' 308 cartridge and the Green Machine rifle as well.

I've had it a long time and shot an awful lot of rounds through it over the years.

Guy

 

[wingnut]

The 30 cal 110g E-Tip is near identical length and shape as the 125g BT. Just saying. :wink:

ETA:

Cartridge          : .308 Win. (SAAMI)
Bullet             : .308, 110, Nosler E-Tip 59380a
Useable Case Capaci: 49.546 grain H2O = 3.217 cm³
Cartridge O.A.L. L6: 2.750 inch = 69.85 mm
Barrel Length      : 22.0 inch = 558.8 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 61000 psi, or 420 MPa
or a maximum loading ratio or filling of 100 %

USE ONLY FOR COMPARISON !

Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
Hodgdon H335                        99.0     49.3     3.20    3296    98.6    61000    8302   0.892  ! Near Maximum !
Norma 200 *C                        98.5     44.0     2.85    3254   100.0    61000    7531   0.917  ! Near Maximum !
Shooters World AR Plus             100.0     49.0     3.17    3229    97.0    59941    7999   0.914  ! Near Maximum !
Alliant Reloder-7                   95.9     42.4     2.74    3212   100.0    61000    7220   0.908  ! Near Maximum !
Shooters World Tactical Rifle       99.4     48.3     3.13    3210    95.7    61000    7834   0.901  ! Near Maximum !
Shooters World Tactical Rifle       99.4     48.3     3.13    3210    95.7    61000    7834   0.901  ! Near Maximum !
Alliant Reloder-10x *C             100.0     43.1     2.79    3206   100.0    56497    7646   0.933  ! Near Maximum !
IMR 4198                           100.0     41.0     2.65    3193   100.0    58345    7106   0.905  ! Near Maximum !
Winchester 748                     100.0     49.1     3.18    3193    95.6    52752    8355   0.942  ! Near Maximum !

 

[Guy Miner]

Wingnut - that would be fun to try! I know that Nosler also makes a 125 grain AccuBond, and that Barnes makes a 130 grain TTSX. I think they also make a 110 grain TTSX... All of those should work even better on game.

Regards, Guy

 

[JD338]

I use the 110 gr E Tip in my 300 Blackout, impressive bullet.

JD338

 

[wingnut]

I'd love to see a round nosed version of the 110g E-Tip for the 30-30, M1 Carbine & maybe a Savage or Krag. :idea:

 

[wvbuckbuster]

Wingnut - that would be fun to try! I know that Nosler also makes a 125 grain AccuBond, and that Barnes makes a 130 grain TTSX. I think they also make a 110 grain TTSX... All of those should work even better on game.

Regards, Guy

A friend uses the 125 AB in his 308 with very good results. Started with the BT then changed to the AB just thought it might hold together a little more. No complaints. Dan.

 

[Alderman]

Another good video. Will have to try some lighter bullets. Might work well in the TC 30-30 as well.
Curious if you have a method to measure actual recoil?


Sent from my iPad using Tapatalk

 

[Elkman]

Great write up Guy, I have been using 44.5 grains of Varget for several years, behind the SMK, and have seen similar groups. My 308 is my plinking rifle, and I take it south in the winter for Coyotes. I use a similar load with soft point bullets.

 

[ShadeTree]

Another good video. Will have to try some lighter bullets. Might work well in the TC 30-30 as well.
Curious if you have a method to measure actual recoil?


Sent from my iPad using Tapatalk

Alderman, can't speak for Guy, maybe he has a way to measure it. But a formula I ran across somewhere years ago stuck with me. I guess because I like math. It's simple and holds up against other online calculations that are more complicated.

It's Recoil = (B+P x P) / (RW x 80)

Bullet + powder X powder. Divided by (rifle weight) x 80.

So in Guys light 308 load.

125 bullet weight + 50 grains of powder = 175

175 x 50 grains of powder = 8750

Take an assumed total rifle weight of 8 lbs and multiply it by 80. = 640

Divide 8750 by 640. = 13.67 ft lbs of recoil.

Using the same formula and figuring the same weight rifle, that's right on the money with a normal 7mm-08 load using a 140 gr bullet. Nobody ever accused the 7mm-08 of being heavy on recoil using a suitable weight rifle.

Comparatively it's less than Guy's 25-06 load with 115 BT's using the same weight rifle. That's if I remember his charge weight correctly. I think it was 60 grs.

You can use that formula to pre-figure the recoil with your 30-30 TC. It wouldn't be much because of the low powder charge, but I don't know your gun weight.

 

[Guy Miner]

Another good video. Will have to try some lighter bullets. Might work well in the TC 30-30 as well.
Curious if you have a method to measure actual recoil?


Sent from my iPad using Tapatalk

Not yet... I used the JBM ballistics calculator, free and available online.

Gavin and Travis at Ultimate Reloader are working on some sort of in-house recoil measuring device, but I haven't poked into that project yet so I'm not sure what's going on there or when it's going to surface.

Guy

 

[Guy Miner]

Loading some 130 gr Barnes TTSX today. Hoping that they shoot great - if so I may well use them for mule deer later this month.

Guy

 

[Rednek rampager]

So, what’s the recipe you’re going to use with these Barnes bullets?


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[ReloadKy]

I have tried the 125 ballistic tips and 125 accubonds in a 308 and a 30-06. Groups out of both were outstanding!! I am saving some of the accubonds for when I finally get another 308. I regrettably sold the last one.