ZG47
AH fanatic
- Joined
- Jan 20, 2015
- Messages
- 899
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- 1,140
- Location
- Wellington, New Zealand
- Member of
- NZDA
- Hunted
- New Zealand
7mm-08 is the modern incarnation of the 7x57 Mauser (they are almost ballistically identical) . It's a long-for-caliber bullet (same as your 7mm Rem Mag) for less money, less recoil, shorter action, and longer barrel life.
Inside around 300 yards, there is little, if any advantage to the 7mm Rem Mag over the 7mm-08. The big advantage of small (.284, .308) and medium (.33) magnums is found at distances beyond 300 yards over their non-magnum cousins that use the same bullets.
With a 200 yd zero, a 7mm Rem Mag has about 2-3" holdover advantage compared to 7mm-08 when both are shooting the same 175 gr bullet. For a lot of people, that difference is so insignificant as to be outweighed by lower ammunition costs, reduced recoil, and a shorter action. And there's even less difference between 7mm Rem Mag and 280 Rem than 7mm Rem Mag and 7mm-08/7x57 Mauser.
I agree that the 7mm-08 is similar in performance to the 7x57 but if you run it up to true, i.e. CIP pressures, you tend to have pressure-related issues, some of these being case-dependent. During the 14 years that I ran a club range complex, the centrefire chamberings most commonly related to extraction problems were, in descending order;
.223 Remington, .243 Winchester, 7mm-08 Remington and .308 Winchester.
This was due to a combination of excessively straight cases and overly enthusiastic load development.
The 7mm-08 does work very well, if:
(a) you are sensible about your load development targets;
(b) you buy a rifle with guaranteed feeding reliability for .308 Winchester type cases, such as Sako, Steyr Mannlicher, etc;
OR
(c) you purchase a rifle that can be timed (tuned for reliable feed) and engage a genuine gunsmith to perform that task.