300wm and 338wm
- Thread starter Alberta Bigbore
- Start date
Alberta Bigbore
CGN Regular
- Location
- Edmonton, Alberta
U guys are funny...lol
- Location
- In the shadows of the Rockies
Bet you can't wait to get your rifle sighted in with your best accurate load. With the fine quality Jard trigger I installed in my 338 WM Ruger Hawkeye it's quite accurate. Prefers 250gr Hornady spire point bullets. Check out these groups.
3 shot group at 100 meters off the benchrest
3 shot groups at 200 meters off the benchrest
3 shot group at 100 meters off the benchrest
3 shot groups at 200 meters off the benchrest
If case design has no effect on accuracy, could you please explain the 6ppc.
bearkilr
CGN Ultra frequent flyer
- Location
- Nowhere, ......just past the middle
- Location
- Somewhere on the Hudson Bay Coast
.338 Winchester? Huh, Elmer thought it was a decent antelope gun. I've never been enamored with it, and would choose an Edge or an Ultra, if I was going the .338 route. That said a big case 9.3 or .375 is what floats my boat.
Well, it's impossible to prove a negative, so the task is really to prove the positive. Can it be conclusively proven that 6ppc is more accurate than another 6mm firing the same projectile at the same speed?
- Location
- Somewhere on the Hudson Bay Coast
And if it does prove more accurate than another 6mm cartridge, is that due to the 6 PPC cartridge design, or is it just a hummer of a barrel? If you chambered the 6 PPC in a particular barrel, then re-chambered that same barrel for another cartridge, that ultimately doesn't shoot as well, is it due to the 6 PPC's superior case design, or a better reamer?
It's the case design. Short cases seem to get a more consistant burn, this makes them easier to tune. I've read stories from benchresters that have rechambered. But from br to ppc and it shrunk their average scores.
Theres a reason the 240 weatherby isn't dominating the short range br scene and its not cause it's so fast.
Theres a reason the 240 weatherby isn't dominating the short range br scene and its not cause it's so fast.
There are many uncontrollable or quantifiable factors at play... but in general, the BR results can be examined to draw general conclusions, I believe that the stats would support the following order for inherent accuracy of the three cartridges;
1. 6mm PPC
2. 6mm BR
3. .243 Win
Of course there are many other 6mm cartridges being utilized and that would cause a shuffle in the order. And this is just a VERY general and casual observation. Having shot all of these cartridges in similar platforms, this would mirror my own experiences, but my personal sample size is so small as to render my conclusions and observations virtually irrelevant.
Since the Browning has a 26" barrel, muzzle speeds should be about 50 fps faster than shown in the Hornady Handbook for a 24" barrel, which puts it within 150 fps of the 340 Weatherby. Not a huge difference - but it's all fun and games any way you look at it.
Most Hornady max loads are on the light side... compare the current manual to the older manuals or to manuals from other manufacturers and you will see what I mean (in general, there are exceptions).
I read somewhere they developed 6ppc because 243 had too much recoil for sustained performance. That would let out 240 Wby too, right?
It was part of the whole "win with 308 because 30-06 has too much recoil" then "win with 243 because 308 has too much recoil" thing.
And "seem" doesn't really speak to many of Boomer's points. It's just another hypothesis, not even a theorem.
Lower velocities are the reason. Faster you go, the faster the bullet spins, and any inconsistencies in bullet manufacturing will have a greater effect on a faster rotating bullet.
The 6ppc simply has a near prefect case capacity for 100/200yd target shooting. Stretch that out and faster cartridges capable of throwing heavier pills will be better.
Then by that logic the 6x45 and the 6x47 with slightly less capacity should be at the top of short BR, except they're not. Short fat powder columns burn in the chamber and not in the barrel. The result is better consistency and creates a higher degree of accuracy. Will long cases shoot as good of groups once in a while? Sure they will, but the short fat case will shoot smaller averages.
And thats my last post on this derail...sorry OP.
Cheers. I'll join in ending the derail after I make the point that I don't know anything about the comparative accuracy of cartridges.
- Location
- Somewhere on the Hudson Bay Coast
Since this discussion is about hunting rifles and their cartridges, theoretical accuracy, that can only be observed in the laboratory of short range bench rest, is irrelevant. What we are concerned with is accuracy we can use in the field, and in that respect cartridge design alone plays no role. Cartridge design does however limit or enhance ballistic and terminal performance, and that performance is something we can use.
Bustercluck
CGN Regular
- Location
- Fort McMurray
I can't believe this thread is still going. And how it's morphed into so many different discussions.
I've been meaning to ask: Do you trim your beard with a taper guard, or do you use incrementally shorter straight guards as you get up the cheek?
