First I agree a business owner has the right to set any caliber restrictions they deem appropriate. In this particular case however, it’s just dumb. A 6.5 caliber in the right cartridge can run with a lot bigger cartridges due to its efficiency. I happen to be a 6.5 and .308 caliber fan and have many of both. My favorite are a 6.5 SAUM and 300 Win Mag. I happen to hand load, but many don’t. While my comparison will be my 6.5 SAUM hand load against off the shelf 300 Win Mag factory ammo (not entirely fair), many clients are running factory ammunition in these larger cartridges the outfitters are deeming appropriate. Let’s look at energy over distance between these two until my personal energy limit for elk, 1500 ft lbs (1200 for mule deer).
6.5 SAUM: Personal Handload
156 Berger at 3030 fps (confirmed to 1400 yards)
Ft Lbs:
200 yards: 2713 ft lb
500 yards: 2108 ft lb
700 yards: 1765 ft lb
1000 yards: 1333 ft lb
(MAX 1500 ft lb yardage: 875 yards)
300 Win Mag: Hornady 200 ELD-X Precision Hunter
200 ELD-X at 2850 fps (box velocity)
Ft Lbs:
200 yards: 2973 ft lb
500 yards: 2187 ft lb
700 yards: 1761 ft lb
1000 yards: 1243 ft lb
(MAX 1500 ft lb yardage: 825)
As you likely guess the Win Mag starts off with more energy, but not a lot. By 500 yards they are damn close and by 700 yards my SAUM has more energy than the Win Mag with factory ammo. With the smaller 180 stuff, I run away with it in a 6.5 much much faster.
The better answer would be for a guide to impose an energy minimum. Let them limit to whatever they feel comfortable with on a direct shoulder hit and simply take the 25 seconds to calculate the max distance for that specific cartridge/caliber combo. But all cartridges in a given caliber are not created equal. This is especially true with your fast 6.5’s like a .264 WM or 26 Nosler.
Here is this years elk taken with a 6.5 at 351 yards. Biggest bodied bull I’ve seen in a long time. Pass through through the throat quartering hard too, exiting behind offside shoulder. 2395 ft lbs. 159 ft lbs less than the Win Mag would have had in the example above. Both cartridges would obviously kill this bull just as dead if the bullets hit somewhere vital.
Rant over.
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