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Which caliber is the most over rated.

I wouldn't say the 243 win is ideal. It would do the job.
I own a 243win. Don't use it. There are better choices from my selection and I wouldn't consider any of them a magnum.
The muzzle velocity on a 308 win drops 15 fps from a 24" to 20" barrel. The 7-08 a little more and the 260 rem a little more yet.
The 22" barreled 308 win with a 150 gr spitzer will have a greater muzzle velocity than a 22" barreled 30-06 with a 150 gr spitzer.
Working pressure is every bit, if not more important than case capacity. The 308 win works at 52,000 psi. The 243 win works at 52,000 psi. The 7-08 works at 52,000 psi. The 30-06 works at 50,000 psi. The 270 works at 55,000 psi. The 7 rem mag works at 55,000 psi. The 25-06 works at 55,000 psi. The 300 wsm works at 62,000 psi. This is why some cartridges perform better than it seems they should.
If all cartridges were loaded to the same working pressures. The size of the case and bullet would have a greater influence than it does.
If the 308 win had a working pressure equivalent to the larger capacity 300 wsm. The 308 win could possibly exceed the 300 wsm in performance.
Size only matter the those that think bigger is better. Working pressure is where it's at.
I prefer a shorter, higher pressure case for performance and a longer case for greater bullet weight.
It gets to a point where the capacity will not increase the performance and there is an excessive amount of wasted powder.
These new super mags are a great example of waste.

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Which caliber is the most over rated.

Well, fuzzybear, I have to differ with you on several points. I've chronographed 150 grain loads from my 30-06 at 3100 fps MV. I am not aware of any 150 grain 308 load achieving that velocity. I have chronographed the 165 grain bullet at 3000 fps MV, and the 180 at 2800 and one slightly more than that. Again, that's more than I have ever heard of from a 308. Same with the 270 Winchester and 7mm-08 Remington, although I have not personally chronographed 270 loads.

In the 7mm Remington Magnum, I have chronographed 140 grain Nosler Partition bullets at velocities of 3300 to 3400 fps, which is equivalent to the 7 STW, which uses a much larger and less efficient case. 150 grain bullets such as NBT, Sierra BT and others at anywhere from 3240 fps all the way to 3300 fps from a 26 inch barrel using H-1000 powder. 160 grain class bullets in my opinion define 7mm Magnum performance. 3000 fps MV is relatively easy to attain, I have chronographed loads with 160-162 grain bullets at 3100 fps, and even some at 3200 fps, again from a 26 inch barrel. My ADL Synthetic with a 24 inch barrel still achieves velocities in excess of 3100 fps. My pet loads are somewhat more tame than these max loads.

Conversely, the 7mm Remington Magnum has only a little more case capacity than the two short mag versions. The 7mm RUM has considerable more, in fact I believe its a bit larger than the 7mm STW case. Like I said before, I have a 7mm-08 in a short, light rifle. The recoil and muzzle blast are considerable, and I like the balance of my 8 lb 30-06 and my 8-1/2 lb 7mm Rem Mag a lot better. The rifles weigh 8 lbs and a little change. I weigh 200 lbs. They do not bother me when I am out in the field.

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Which caliber is the most over rated.

Captain
Your OBVIOUSly having difficulty with comprehension, AGAIN!!
If you read it again, it says 308 and 30-06 with 150 gr. Nothing said about 165 gr or 180 gr in the 308.
You are differing on something of which you have little knowledge. Yes, the compact case and higher pressure limit give the 308 an edge with bullets up to 150 grs.
It will just about equal the velocity with 165 grs. and falls behind with the 180 gr and above. This is due to the larger 30-06 cases ability to hold a lot of slow-burning powder.
I have no desire to quote a statement from a renowned component manufacturer. If you still find it necessary to contest this. Possibly it's time for yourself to do more research. Please don't mislead those that have a desire to progress in their knowledge of ballistics.

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Which caliber is the most over rated.

Thankx for the facts fuzzy.I have one question,when you say the 7mag works at 55.000 do you mean thats how much pressure is required for the bullet to leave the barrel or that is the amount of pressure needed for optimum performance?One more,I have a 24" barrel on my 7 mag what difference if any would a 26" barrel make,I shoot 150gr Nosler Partitions with the recomended amount of 4350.

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Which caliber is the most over rated.

Fuzzybear, I'm not contesting you. I'm disagreeing with you. As I said in my post, I have never heard of a 308 that shoots a 150 grain bullet faster than a 30-06. Hell, a tangible example is the Hornady LM ammo. Even with the lighter bullets, a 308 doesn't shoot as fast. Aside from this, why do you have no desire to post a statement from a ''renowned component manufacturer?''

And with the 165, again, I have never heard of a 308 driving it as fast either. I'm aware that you didn't say anything about 165's or 180's. I did. So this being said, how is it I have little knowledge? When you throw in crap like '' you're OBVIOUSLY having difficulty with comprehension AGAIN'' and ''you're differing on something of which you have little knowledge'' it just shows you're being defensive. I did not even go into higher pressures and case design, I just said a 30-06 can still shoot faster, and it does.

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Which caliber is the most over rated.

SAMMI sets the pressure levels by testing a variety of components, threw a variety of firearms, under laboratory conditions.
The pressure level is the maximum that the round can safely be loaded.
The level can be exceeded by changing a component, exceeding the powder charge or not loading up to the recommended minimum charge. Yes, not enough powder can cause the pressure to jump to dangerous levels.
This info should be in the reloading thread. If your interested we can jump over to reloading.
Briefly, the pressure levels are reached in a fraction of a second. The optimal load is one that has all of the powder burnt at the moment the bullet leaves the barrel. A 26" barrel would need a slightly slower powder than 22" barrel.

Captain O,
These are not my facts. these are facts from reputable component manufactures. Do some research. It gets very interesting
The powders that are used in the light mag loads are not available to the general public.
They are not going to load a 308 win to it's maximum. just as they don't load the 270 win to it's max and the 300 wsm is greatly underloaded. In fact, you probably won't believe this either, the 300 wsm will match the 300 wm with all bullets up to 180 grs with 10% less powder and less recoil.
I'll say it one more time. The 308 win will exceed the 30-06 with 150 grs or less and match the 30-06 with 165 gr. Now youv'e heard of it. Check it out for yourself if you don't believe it. There are volumns of info that is not released to the general public.

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Which caliber is the most over rated.

When you think about it, all factory ammo is greatly underloaded, except perhaps some Weatherby ammo. In fact, it appears lately some ammo manufacturers have backed off 270 Winchester loads, like for the 130 grain bullet. The average is like 3050 or 3060 fps nowadays, even though it is well known to reach 3150 fps without exceeding SAAMI pressure limits.

To be honest, I've chronographed Hornady LM ammo, and as a rule, it is substantially below advertised velocities. They test them in a pressure barrel, rather than in a hunting rifle. The only load that actually stood up to testing that was done by others on the very same thing were the 180 grain loads, but they were still below the advertised 2880 fps. I'd put the Sierra Gameking over the LM 180 any day of the week.

I believe you, a 300 WSM can match a 300 Winchester Magnum, but that is all. If you are comparing them, you have to be using optimal loads for both, and the 300 WSM can approach or match, but when both are using max loads, that's as far as it goes. I know this because my cousin hunts in Africa and has had most of his rifles worked over by Kenny Jarrett and was researching the 300 WSM and they went through all of this. I trust Jarrett's information.

I still don't believe a 308 can drive a 150 grain bullet faster than a 30-06. If the information that would support a 308 driving a 150 faster than a 30-06 (ceteris paribus) is not available to me, it really doesn't matter anyway. It's not in the reloading manuals or in general ballistics information, and I've never encountered or heard of it in my reloading experience. Maybe there are some sort of like top secret, like classified sorts of loads. Heck, now that I've said that, men in black suits might come and deneuralyze me, like in that movie Men In Black!

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Which caliber is the most over rated.

That was a great movie.
I'm not quite sure but, look in the Speer Reloading Manual #13. They may have some info on the 308, 30-06 loads. The last time I spoke with them they were still updating their info.
Hornady has been reseaching high velocity rounds with these new powders. They have info on the results. VihtaVuori makes the powder for their light mag loads. It must be top secret. They won't release the info, at least not to the general public.
I also understand that there is some continuing research being done on mixing powders of different burn rates. I wouldn't recommend it. Except under laboratory conditions where there would be no risk af injury or fatality. 55,000+psi can do a lot of damage.

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Which caliber is the most over rated.

Well I can assure you one thing: it may not be first and foremost, but at some point case capacity is going to figure into it. 53.5 grains for a 308 and 68 for a 30-06 is a significant difference. Not necessarily the most important difference, but important nonetheless. Like I said, all comparisons must be ceteris paribus (all things equal). So if you're using some mystery powder in the 308, you must use it or an equivalent for the 30-06.

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Which caliber is the most over rated.

What does all this info have to do with the topic of the thread?You can argue loading tech all day but your special secret high tech super duper hotloads dont kill game any deader than the factory loads you buy over the counter at Walmart so why spend so much time working on them?

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