Tell me I’m crazy, 338 rpm

[FEENIX]

That's been the hard part, there's SOME but not a lot of information on that cartridge. That's where I was hoping there would be some that would chime in about first hand loading data.
I really think hot rodding a 210 ttsx or a 200 grain accubond in some Peterson brass and that thing could be a hammer!

WBY website offers 185 Barnes TTSX, and 225 Hornady Interlock/ Barnes TTSX/NAB and provided ballistics. You should have plenty of information to decipher if it meets your long range concern.

They also provided side by side comparison, and similar cartridges to compare with.

 

[Dr. Vette]

I would buy it, in fact tell me where its at!!

I had the same thought.
If he's not going to buy it, at least tell the rest of us where it is.

 

[med358-boise]

That's been the hard part, there's SOME but not a lot of information on that cartridge. That's where I was hoping there would be some that would chime in about first hand loading data.
I really think hot rodding a 210 ttsx or a 200 grain accubond in some Peterson brass and that thing could be a hammer!

The purpose of mathematics is a decision, not a number. I just ran the numbers for the 225 TTSX which is what the factory load is assuming only 2575 fps @ 400 yards the impact velocity is 1970 fps @ 350 is 2040 fps.

If either of those two distances constitute longer range in your mind, and since both of those numbers are adequate for expansion you have your answer.

 

[AussieWriter]

One thing the younger generations can't comprehend is that fudd cartridges are extant because they have worked over a period of decades often exceeding a lifetime.

Having the hots for a new (ish) trend is not a fact to include in a comparison.

Using faster powder when barrels are shorter does not equal the performance of the traditional slower powder already used with the standard, now considered longer barrels.

The short barrel fans are avoiding the word "carbine".

Suppressors are a modern fad, something new to the masses so must be an innovation to be grasped. No, they have become more practical because of the fascination with shorter barrels which blast the ear off the side of your head.

Shorter barrels are making inroads over usual length barrels and will dominate the market. No, they will reduce the market sales because older experienced shooters (still the majority) have long memories and poor hearing and won't go there. Additionally they increase the cost of the rifle because suppressors usually cost more than a new barrel.

Adding suppresors improves the balance of your short barreled rifle. This sentence as 2 meanings if you have an open mind.

You can't put old heads on young shoulders. (My dad's famous words)

 

[skipglo]

Why is it that 99.9% of all comments here aren't in the OPs topic? He's simply asked for folks to tell 'em he's Crazy! So ...ON TOPIC...."YOU'RE CRAZY" ...hope that gives you what you're looking for!

 

[AussieWriter]

On topic.......
There is a reason that rifle has been on the rack so long and heavily discounted.
The cartridge was DOA.

 

[FEENIX]

The purpose of mathematics is a decision, not a number. I just ran the numbers for the 225 TTSX which is what the factory load is assuming only 2575 fps @ 400 yards the impact velocity is 1970 fps @ 350 is 2040 fps.

If either of those two distances constitute longer range in your mind, and since both of those numbers are adequate for expansion you have your answer.

Like I said, WBY has provided them already, @Backcountrydreamer1996 just need to navigate through WBY's website. For instance, at 500 yards:

185 TTSX = 2080 FPS/1778 FT-LBS
225 TTSX = 1981/1961
225 Interlock = 1771/1567
225 NAB = 2051/2101

 

[Quintus]

I have and love the Mark V backcountry. The only reason I don't have one in 338RPM is the 18" barrel, some days I think maybe I will try one just because of the 18" barrel. If they ever stretch it to a 22" I may be first in-line.

 

[BigNate]

Yep, you're crazy!

There are lots of other cartridges I'd consider before the RPM. Not that it's bad but it was another solution looking for a problem to solve. If you do buy it, buy enough brass to outlast the barrel.

 

[quandary]

If you look at the old Weatherby ballistic charts they tell you that the velocities are out a 26" barrel. They don't list detail in the current charts but I suspect they wouldn't have changed the practice. The also say to take 30fps to 65fps off the velocity for each inch of barrel length less than 26". Let's call it 50fps. This would put the following velocities on their loads at the muzzle;

185 TTSX - 2,700
225 TTSX - 2,400
225 IL - 2,400
225 AB - 2,425

Are these velocity numbers you would be happy with? If yes, buy the rifle and be happy!

 

[Dr. Vette]

If you look at the old Weatherby ballistic charts they tell you that the velocities are out a 26" barrel. They don't list detail in the current charts but I suspect they wouldn't have changed the practice.

The longest 338 RPM barrel that Weatherby installs is 24 inches, so that's likely what is listed for their speed.

 

[Quintus]

The longest 338 RPM barrel that Weatherby installs is 24 inches, so that's likely what is listed for their speed.

The published velocity is from a 24". they do have 20" barrels on the carbon models and it sounds like they run about 100FPS under the 24" for each load. so your looking at about 2700fps from the 225 grainers in that configuration. The TI carbon in 338RPM is listed at 5.3lbs, steel action version at 5.8lbs. I am thinking a guy could probably run a 210 Partition or Scirocco or Hammer out of the 18"and get in to that 2700/2750 range making it a stomper out to 300 yards.

 

[quandary]

Please note the footnotes

https://weatherby.com/wp-content/uploads/2019/09/BALLISTIC-CHART-4-5-21-MSv2.pdf