What to expect- Bartlein 7mm Weatherby barrel life-

[dogz]

Just another FYI, I ran the ballistics between the 180 grain Berger at 3000 (7 Bee) and the 162 grain ELDX at 2900 (7RM)

Just a SWAG here but he is using the 7 Bee (bigger case) for the 180.....I do see it as 3000 out of the 162 would be a more fair fight and 3K is doable out of the 7 Rem

 

[warrbuk]

That is great inside

That is great first hand insight. Thank you Greatly Warrbuck. I am indeed planning to use Peterson Brass. Do you mind me asking what Dies you use? It doesn't look like there are a lot of options out there.

A couple things. My buddy had a custom spec'd reamer all set up for the 180 VLD's and had chambered 2 or 3 rifles with that reamer. Each one shot easily sub .5 MOA with the 180 and H-1000. I essentially pushed the easy button, built it, broke it in with 10 shots and tried two load combinations that he had. Both were sub .75 moa for 2, 5 shot groups each. I loaded up and rolled. I copied his copper load also as we are in California and it shoots great and its point of impact is .25-.35 moa right of the 180's. I love the long neck of the wby brass, I feel like I could get a 162 /168 class bullet just off the lands

I use standard redding FL dies. I have removed the expander ball and use a .281 (I think) expander mandrel to get my neck tension.

In summary a standard 7mm weatherby chamber will be a fail.... those Berger VLD's need to be .015-.045 off the lands. The 7WYBee does have a larger case capacity but I feel up until the peterson brass (thus far a unproven theory for me) you may get very close to its performance with a 7RM that is throated long.

If I did not have access to a proven reamer or my smith did not have a reamer w/o the throat on it I would seriously consider 7RM with a long throat. 180's and retumbo may get you where I am shooting my 7Wby.

 

[HandgunHTR]

Just curious:

Why would you compare a 180gr at 3,000fps to a 162gr at a slower velocity, instead of a higher velocity. I'd expect a 162gr to do 3,100fps, give or take.

The comparison was a 180 grain out of a 7 Bee and a 162 out of a 7RM. The point I am trying to make is that you will get better barrel life, lower recoil, easier to find components, and still have what is necessary to perform on all NA game animals to the OPs stated limits.

 

[dogz]

That's the beauty of the Mashburn, I'm getting 1700-2500 rounds give or take out of a barrel where as people running the 28 Noz talk about 500-900 rounds or so (personally I think that's a bunch of bunk). I'll gladly give up 100 fps to get 2x or 2.5 times more rounds out of a barrel...