+P THROAT

Sounds like he is adding some free bore in the throat area. This will lower pressures a little and give slightly faster velocity, but you will not be able to touch the lands in the barrel if you want to hand load your own ammo. Weatherby chambers are made this way so they can get that extra 100 FPS from there magnum rounds.

Shipped my bbl to Shawn Carlock at Defensive Edge in Rathdrum ID on 2/3/20 to cut the plus P.
Got it back today 2/10/20.
I don’t know how the chambering will work out but the service was excellent and fast.
I like doing business with people like that.
Will keep u posted on the bbl performance.

Yes Sir. Been shooting the Edge for several yrs.
This is my third bbl.
It is a 30” hvy varmint Bartlein. I’ve always seated long
and single shot it.

Only hunt with a 338 occasionally. For hunting inside 500 yds I generally use my smokeless mzl.
If i need more fire power I’ll carry a 300 RUM.

The 338 is primarily for steel from 1000-2000.
I generally load 300 Bergers in front of H-1000. Never been a fan of the Alliant powders. H-1000 is the least temp sensitive and single base powders are much more throat friendly than double base powders.

I’m hoping to gain 100 fps with the +P and still shoot H-1000.
Just an experiment.
I’ll post the results.

H-1000 is definitely not the fastest powder for the 338 Edge. It’s advantages outweighs everything else I know of though. That’s why the P throat was so attractive. I’d like to have that extra 100 fps.

I did get really good velocity and small extreme spreads with N570 but bbl life is so short that I elected to go back to H-1000.

If ur having to dial 50-60 MOA I guess it’s not that important anyway.
It sure is fun though.

I’ve never tried 7977 Dennis.
I did give Retumbo a try in a 300 RUM.
I couldn’t get my extreme spread low enough to satisfy me.
To be honest I think I tried it with 165’s or 168’s. Probably not the best choice of bullets for that powder. I may have to revisit it with heavier bullets.
I know some use it with good results.

When I tested WC872 powder in my Edge I got crazy load extreme numbers the velocity was not quite as high as RL33 but it shot very good groups on paper at 1,000 yards. WC872 is not a temp stable powder it really works best in cold weather because it was designed for that purpose. About 110grs is all you can get into a Norma case. It also burns clean once you start building some pressure same as RL 33 you have to come up on the pressure curve to make it work.

That's a good start. 3,000 fps is a doable number without hurting your brass with the right combination. If your happy with H1000 stay with it. I went to RL33 and have no plans of going backwards.

A 300SMK at 3,000fps will get the job done. I and my hunting buddies have taken a lot of white tail, Mule deer and Elk at extreme ranges in Colorado and Pa. I see Hornady is bring out a 300gr A-Tip which has a BC of .863 That is really high for a .338 bullet. A fellow posted a picture of one he cut apart there is no void between the aluminum tip and the lead core so it will be questionable how well it will perform on game BC is not everything the bullet has to have reliable expansion the 300gr SMK puts big holes in mule deer and elk at 1850 yards.

I have been at this long range game for over 35 years. Don't believe the charts and advertising that powder companies Put out. All the Elk and mule deer were taken in Colorado at 9500ft elevation. with a average temp of 30 degrees. The rifles we used were 338/378 and a .338/416 improved both burning old surplus IMR 5010 powder which is by no means temp stable which is not a problem because we are hunting in cold weather not hot weather.

To kill animals at ELR you need a accurate rifle that shoots a heavy enough bullet with enough energy remaining to kill the animal cleanly. This is were the .338 really shines. You also have to have a very accurate range finder to give you the correct yardage which we always had. The wind is the unknown factor in the whole deal sometimes we didn't put on click on out to 2,000 yards and other days you had 30 plus feet of wind drift. To keep it simple we never attempted to kill a animal in a unfavorable condition no matter how big it is. Like I tell a lot of people long range hunting is totally different from any other form of hunting you glass from sunrise to sunset an if your in a good area you do get to see more game than most of people but that doesn't mean you'll get to kill anything.

I use H1000 in some of my guns. I simply couldn't get to were I wanted to be with the Edge till I went to RL33.

You should look at your drop chart again at 1850 yards it drops 1,114 inches not 114. If your range is off by even 10 yards at these ELR distances you will miss the animal the size of a deer. So worrying about a few feet of velocity swing really doesn't amount to anything you can have bigger swings in STD then what you temp swing might be.