The 25 WSSM is about the equivilent to the 25-06 so recoil shouldn't be that bad. To say it was too strong for your 9 year old would depend on the child. It is not strong recoil but what other calibers has he shot with?
His age is not really the determining factor of his ability to accept recoil. I've been a competitive skeet shooter for years and have wanted to teach my brothers kids the sport. Most professional instructors (see Fred Missildine's book) will advise you not to start a child until he/she weighs 75 pounds. For skeet shooting that would be the min weight using a 20 ga autoloader to start. To much recoil to early develops bad habits...... the body will naturally avoid the sensation of pain. The kid may develop a flinch or a hesitation to pulling the trigger or something like that, all bad in shooting sports.
I'd use the same guide lines for rifles.
We hear more and more about giant bucks these days.
Hunters are on a mission, scurrying to and fro – and even from state to state - trying to find the “perfect” hunting area where big bucks abound and they are found chasing does at all hours of the day.
These properties exist but they are expensive to maintain and generally, very expensive to hunt!
Let’s look at possibilities closer to home – your land, your lease or land that you have permission to hunt!
My brother and I are fortunate to...