Ok, Eld, are you saying that there is no such thing as a more efficient burning cartridge to another. And are you saying that larger Velocity spreads won' t affect you extreme long range accuracy? Curious what you think?

For 99.9 % of anything you will ever ask of a big game hunting rifle...inherent accuracy of cartridge designs will not be a factor. For a long range varminter that percentage fiqure drops considerably. For a " bench rest competitor" that difference is the difference between coming in first....or coming in last.

Contact the personnel in the ballistic' s departments at company' s like Sierra, Nosler, etc. (not customer service reps) and ask them if there is a definitive difference in ballistic efficiency and inherent accuracy from different cartridge designs. These company' s have put more time, money, and research into answering that question then the average lifetime of hunter' s will either need or want to know! (And they usually don' t even provide the custom..." made one at a time" .....bullets that the custom makers produce for many benchrest match users.)

If after your conversation with these individuals you still have any doubts?!? Let me know! But once again if you only need to know concerning " hunting accuracy" , save yourself the bother. Pick the cartridge that you believe comes closest to meeting your needs and desires...and enjoy using it!

NO! I am not saying that at all! I am saying that there are no particular cartridge designs that are inherently INACCURATE! What I mean by this is that it is possible for ANY cartridge to produce an acceptable level of accuracy if the combination of gun, load, and sighting equipment is right! Granted, it is EASIER to develop exceptionally accurate loads for some cartridges than for others. Many " over-capacity" (whatever that is!!) cartridges are much fussier about what you stuff in them, for sure!

I am well aware that short, fat powder columns, like those in the PPC cartridges, the wildcats based on the .284 Winchester, etc., generally produce more efficient, consistent burning of the powder charge, and hence, less variation in muzzle velocities. I am also aware that loads which produce the least velocity variation are thought to be the most accurate, but very often are not! I have personally chronographed loads in some calibers which gave more variation in shot-to-shot velocity and produced smaller groups than some more consitent loads! This means, for example, that the Lyman Handbook' s " POTENTIALLY MOST ACCURATE LOAD" often does not turn out that way in any given rifle.

The original topic was a question as to the " inheritant accuracy of three WSM (.270, 7MM, and .300) cartridges. I challange anyone to make a case to show one is " inheritantly" more accurate than the other.

One might argue that there' s more .30 cal bullets available and that makes for a higher chance to find a " sweet" load in a .30 cal..that granted...there' s a heck of a lot of .270 and 7MM bullets out there too.

To insinuate that a cartridge is accurate because it " inherited it" from it' s lineage is simply a misnomer.

I' ve had 6PPCs in a varmint rifle that didn' t shoot any better than a .243. I' ve owned .308, .30-06, .300 win Mag, and .300 H&H and could never say one was more accurate than the other.

Bear in mind that I' m a hunter...not a benchrest shooter.

Some cartridges have more accuracy POTENTIAL than others. A good example is that when the .308 cartridge first came out, military armorers were chambering Garand amtch rifles in .308 which could significantly outperform their best efforts with the same rifles chambered in 30-06.

In a $500 hunting rifle, it is unlikely you will ever see the difference between 2 such cartridges or any others for that matter.