Dear BC Boy,
My son & I have two Model 71's, a 1940 Winchester Model 71 DeLuxe rifle with a 24' barrel and a Browning Model 71 "carbine" with 20" barrel, mid-1980's vintage. We have used various bullets in .348, ranging from the old reliable Hornady 200-grain flatpoint to the Alaska Bullet Works Bonded Core 250-grainer in Buffalo Bore loads. We have used, and like, the Barnes bullets. I have more experience with the Originals, particularly the 250-grain. In that weight, I find them a little "softer" than the Bonded Cores; both do the job.
The Hawk bullets are, I believe, all copper. I have used their 180-grain offering with the .030" jacket and a special run of 225-grainers with .035" jackets. They hold together very well, better than the Hornady, a bit better than the Barnes. The weights, please note, are not comparable. I haven't used the Barnes X bullets enough really to say this, but I see similarities between their performance and the Hawks. I like the Hawks a lot. The 180-grainer is a devastating deer bullet. I asked for the 225-grainers as an "all round" bullet for heavier game & like it a lot.
If there is any more barrel fouling with the Hawks, I have not found it to be significant. Both my barrels are in fine shape. With a rougher barrel, there might be more fouling.
Both of our 71's have iron sights, and 200 yards is about maximun range for reliable accuracy. At that distance, I like the blow struck by the traditional flat point bullets. If pointed bullets were loaded, you could still use them in the Model 71, if you loaded one up the spout and but one in the tubular magazine. That would make the 71 a two-shooter. With the heavy recoil of the .348, I would absolutely not use pointed bullets in a tubular magazine with multiple rounds, and I assume that you would not either!
We have a number of Ruger No. 1S rifles rechambered and rebored from .218 Bee to cartridges not chambered by the Ruger factory. Two favourites are rifles in .35 Winchester and .35 Whelen, and there is another coming in .303 British. You could doubtless do a No. 1S in .348 Winchester, which would be a great rifle for pointed bullets. I really associate the .348 entirely with the great Model 71, however, which is my favourite lever rifle, with the Model 1895's not too far behind.
Good luck to you!