The "best cartridge", is an ongoing argument, in the same class as arguing religion or politics. The 243, or 6mm Rem are primarily a fox/coyote cartridges, that can be used for whitetail. They are limited to 100 gr bullets. They are fun to shoot, and in the light, short barreled, carry rifle, the recoil is manageable. Shot placement is important. The 25-06 is an amazing performer, giving up only range when compared to the 257 Weatherby. Better performance has a price, muzzle blast and recoil are more and the 25-06 is better suited to a longer barrel.
If I were to hunt Island deer, I'd choose a 260 Rem, as every increase in caliber, has a slight advantage in performance. Ammunition availability is a consideration, and the next step up is a 270, bigger than necessary for little deer, IMO.
In the 243, bullet selection become important, use premium ammunition or ammunition that you know performs well, from experience or scientific studies. My own experience with the 243, on Manitoba Whitetails, gives it a fairly low rating. Realistic performance in the field, ranges from dismal, to adequate, but never spectacular. I don't own one anymore. I wouldn't recommend it as being a good rifle for the one rifle hunter. I've never hunted the Island, but if I were to, I think I'd carry a 35 Rem, as you never seem to have to track whitetails very far after shooting.
25-06, is a different beast entirely, most hunting ammunition uses heavily constructed bullets, varmint ammunition is more explosive. But if I felt that I needed a 25, I'd prefer a 250 Savage or a 257 Roberts, as they bark less, are a bit tamer to shoot. The 250 Savage and 243 are almost the same, except the Savage has a slightly bigger (diameter) bullet.
I had 2 relatives that hunted the Island, 270 and 303 British, and both were one rifle hunters, and they never felt they needed an upgrade.
A good sight for ammunition evaluation is http://www.ballisticstudies.com/Knowledgebase.html
Pretty good stuff, I've donated to the sight, very good research.
If I were to hunt Island deer, I'd choose a 260 Rem, as every increase in caliber, has a slight advantage in performance. Ammunition availability is a consideration, and the next step up is a 270, bigger than necessary for little deer, IMO.
In the 243, bullet selection become important, use premium ammunition or ammunition that you know performs well, from experience or scientific studies. My own experience with the 243, on Manitoba Whitetails, gives it a fairly low rating. Realistic performance in the field, ranges from dismal, to adequate, but never spectacular. I don't own one anymore. I wouldn't recommend it as being a good rifle for the one rifle hunter. I've never hunted the Island, but if I were to, I think I'd carry a 35 Rem, as you never seem to have to track whitetails very far after shooting.
25-06, is a different beast entirely, most hunting ammunition uses heavily constructed bullets, varmint ammunition is more explosive. But if I felt that I needed a 25, I'd prefer a 250 Savage or a 257 Roberts, as they bark less, are a bit tamer to shoot. The 250 Savage and 243 are almost the same, except the Savage has a slightly bigger (diameter) bullet.
I had 2 relatives that hunted the Island, 270 and 303 British, and both were one rifle hunters, and they never felt they needed an upgrade.
A good sight for ammunition evaluation is http://www.ballisticstudies.com/Knowledgebase.html
Pretty good stuff, I've donated to the sight, very good research.




















































