.308 Load Data

[Rumbler]

I have a BUNCH of .308 load data. Maybe getting started with this will motivate me to compile it.

Lets start with . . .

49.0 Varget
130gr barrier bullet (look at the 300 BLK thread for a description)
Winchester Large Rifle Primer (WLRP)
2.697 C.O.A.L.
Tight crimp (Lee factory crimp die)

I have not had the opportunity yet to chronograph this load. But based on my cyphering it should be running in the neighborhood of 3600-3700FPS. It does not show overpressure in once fired nickel brass.

As always: You are just plain insane if you use my data without starting well below it and working up from there in small increments.

[Rumbler]

Darn. I forgot about this. :footinmouth:


Anyway . . . I worked up a new recipe today. These 130gr "barrier" bullets . . . don't seem to be (actually) available outside mil and leo circles, but I'm betting just about any "standard shape" flat based canelatured bullet is going to load pretty close to the same. In fact I used data for a HDY 130gr SP FB bullet as a starting point. Then worked the COAL and charge until I got what I wanted. Hodgdon's data said they should be running ~3089 FPS.


51.2gr BL-C(2)
130gr "barrier" bullet
Winchester large rifle primers
once fired, match prepped FGMM brass
2.688 C.O.A.L.

Chronographed four rounds:

3093
3093 (duplicate)
3088
3089

I threw the first shot low and right about 1/2 inch, but the next three overlapped each other at 100 yards. Easily under 1 MOA.

Remmy 700P, 24" tube.

[seadog]

Interesting

[Johnny]

Try my load for the 130b grn Barnes tipped triple shock,52.o grns of varget ,velo.3159ft per second.Death hell and destruction on whitetails and hogs.Using kimber montanna308.

[Rumbler]

Thanks Johnny. I will !! :)

[north-fl-trader]

Kind of OT but I found this reloaded 308 round under the table in lane 12 at talon a few weeks ago.

Case was trimmed and de-burred bullet looks like a Corelocked Remington. Possibly pull marks on it. Case is FC.

And little to no crimp.

Anyone recognize this?

3448

[Rumbler]

Not I.

But it sure looks like whoever loaded it needs to read up on the purpose of the canelature.

. . . or maybe they trimmed the case too short and had to have the bullet stick out that far to make 2.800 . . . . who knows. Folks do some crazy stuff . . .

[north-fl-trader]

Maybe they were of the mind that "more bullet in the rifling is better", like .040!

[north-fl-trader]

I'm just going to pull it and recycle.

[Airgator0470]

Not I.

But it sure looks like whoever loaded it needs to read up on the purpose of the canelature.

. . . or maybe they trimmed the case too short and had to have the bullet stick out that far to make 2.800 . . . . who knows. Folks do some crazy stuff . . .

The cannelure is worthless if you're not going to crimp... you should see some of my 6.5 CM loads using the 120gr SST... the cannelure sits WELL ABOVE the case mouth... no issues at all.

By the way, WTF is a CANELATURE?... lol

[Rumbler]

The cannelure is worthless if you're not going to crimp... you should see some of my 6.5 CM loads using the 120gr SST... the cannelure sits WELL ABOVE the case mouth... no issues at all.

By the way, WTF is a CANELATURE?... lol


Yup. You should see some of my blackout ammo. If I seated the bullets to the cannelure I'd have to make the cases longer to hold any powder.


By the way, CANELATURE is what someone who is language impaired calls a cannelure.:p


P.S. I always crimp. It is "free" pressure. . . . well you know; unless you get too much of it. Then it is really really expensive pressure. :scared:

[NJC]

Someone may want to reread the Range Rules. Brass and ammo not yours is the property of the range. Could you imagine the chaos and lawlessness if everyone picked up brass???

:-)

[FLT]

Yes indeed . But a loaded round is not brass. Just saying----and shit. :D;)

[north-fl-trader]

As far as I am concerned a loaded round "left" on the ground is an accident waiting to happen.

Last thing you need is to have some 308 roll off the table and pick up one of Rumblers fire breathing reloads and run it thru some ww2, or earlier, rechamered 308 military rifle.

The results could be, spectacular to say the least.

If I find rounds in a box, they go to the office.

One on the ground is a different thing.

[Johnny]

I personally do not crimp my bullets for my riflerounds as I only load for my bolt actions.My pistol ammo yes,i have found no problems doing this over the last 50+ yrs of reloading.If I was loading for a semi auto iwould definitely crimp.AS for the cannelure,I measure the chamber a determine my bullet seating depth,the cannelure falls were it may seating depth controls an extremely lot of accuracy potential in given carts.

[Rumbler]

Johnny you nailed it in terms of the chamber determining the seating the depth for best accuracy.


And bolt gun ammo fed one round at a time certainly do not need a crimp. However, by carefully trimming case length and crimping (then checking concentricity!) it does introduce a level of consistency not available with no crimp because of the variances in case neck thickness. And we all know that consistency equals accuracy.

Yes, that certainly does mean trimming the case neck thickness can achieve the same consistency.

But if you do that, you don't get that couple of extra FPS over the chronograph. :p


Oh, to toot my own horn AND demonstrate the consistency I speak of . . . look at the velocity deviation here:

3093
3093 (duplicate)
3088
3089

FIVE feet per second between the fastest and the slowest. Consistency. I just love that stuff. :)

[Johnny]

I do trim case necks,i do not feed one at atime as my mags are loaded in my firearm while hunting.I also neck size for my bolt guns.But to each his own what works for may not work for you.

[Rumbler]

.308 Winchester

47.5gr Hodgdon H322
110gr Nosler Varmageddon bullet
Winchester large rifle primers
once fired, match prepped FGMM brass
2.760 C.O.A.L.
Medium crimp.

3325 FPS. :jawdrop: