8208XBR load help needed

[Seabreeze133]

I have a new Mossberg MVP 7.62 NATO 18.5" barrel and have a good 175SMK load w/4064 and 150 Hornady FMJBT bullets w/H335 (acceptable mil spec accuracy) loads but now would like some help on using 8028XBR with 150 bullets and LC LR brass accuracy loads. I have a small stash of Sierra 150 boat tail match bullets that I would like to try.

I do not normally use max loads.

And yes I am told the 4064 gives an interesting fireball.

Any input would be appreciated.

seabreeze

 

[CJ6]

Start at about 42 grs. and work up with the 150's.

 

[bobke]

As a point of reference only, I use 44.9 XBR 8208 with 2156/Scenars/2155's in Hornady brass with excellent results in 21" GAP10. 2817 avg-low ES/SD.

 

[spclark]

As a data point for you I've been using IMR 8208XBR for four years now for Palma shooting. 29" & 30" barrels in 1:12 or 1:13 twist, Lapua Palma brass & either Berger's 155 Hybrid or 155.5 Fullbore (at first Sierra's 2156) with 45.0 grains. Case life is excellent, accuracy and consistentcy @ 3,025 fps SD<8. In a new barrel this year I bumped it up to 45.6 with the Fullbore 155.5's after noting they were a little slower at the lower load level than the Hybrids.

You won't see these speeds in shorter barrels but even at a lower node the accuracy should be good.

(I load 22 grains of 2400 in my 185XTP 44Mag loads in my Desert Eagle just for the muzzle flash alone!)

 

[Liven The Dream]

There is one thing to keep in mind " pressure".

8208 in a 308 can go way past the pressure rating for 308.

You can go to there web. site and plug in the numbers .

I have a friend with a Brand new Barnard action and a 30' Krieger Barrel. He was so proud of how it shot with 8208.
Then he went to clean his rifle after a match. Only to find the bolt face with burnt in star pattern. " Shot Very Well "

Was not a tight Barrel , shot 175gr. Sierra's

 

[spclark]

8208 in a 308 can go way past the pressure rating for 308.
Was not a tight Barrel , shot 175gr. Sierra's

Yes it can and that's why I suggest working up to a safe load in any given rifle. I tried it with 185's & found pressure signs at velocities well below what I was looking for. It's not for bullets heavier than 168's (if that) so one needs to use common sense when working up.