Without sales figures this is all speculation.
The latest I saw recently was 2012 for RCBS die sales. It's in the Top Ten.
You bump into these "most popular" and "most ammo sales" numbers here and there all the time and the cartridge is consistently somewhere in the top ten,although it can sometimes be tough to find ammo manufacturers sales numbers.
In the realm of BG cartridges I have never seen the 7RM listed outside the top ten. It's not speculation. You can Google it.
I trolled around for awhile trying to find numbers but my search skills are limited. I did bump into this from another website. Where the numbers came from I have no idea but they are consistent in general for what I have seen for ammo and die sales.
Hows this for official Numbers?
2011 RCBS reloading die sales:
Rifle:
1. .308 Win
2. .223 Rem
3. 30-06 Spr
4. .243 Win
5. .270 Win
6 . .300 WinMag
7. 7mm RemMag
8. .22-250 Rem
9 7mm-08 Rem
10. .300 WSM
Handgun:
1. .45 ACP
2. 9mm Luger
3. .40 S&W
4. .38 Spl/.357 Mag
5. .44 SPl/.44 Mag
6. .45 Colt
7. .380 ACP
2011 Federal loaded rifle ammo sales.
1. 30-06 Spr
2. .223 Rem
3. 30-30 Win
4. 308 Win
5. 270 Win
6. 7mm RemMag
7. .243 Win
8. 22-250 Rem
9. 300 WinMag
10. 25-06
