SanAntoneAg said:
.243 is a legacy round and is great for all ages. If you can't kill most anything in Texas, granted with a few exceptions, as an adult, with a .243, you probably shouldn't be hunting in the first place.
I initially read this wrong and was about to rip you a new one. I 100% agree!
The 243 is a great round. There isn't an animal in NA except for maybe moose and grizzlies that I wouldn't be confident hunting with it given the right bullet selection.
Partitions/Accubonds or TTSXs for big stuff, 90 or 95 grain Nosler Ballistic Tips for everything else. Hell, I might even use the 95 gr Nosler BT on everything. Google Gail Root and the 95 gr Nosler Ballistic Tip. It's a freaking hammer.
My girls (15, 12, and 9) took three does this weekend all at around 110-135 yards.
15 year old was shooting her suppressed Bergara 7/08 with 3-9x42 and Hornady 150 grain ELDx
12 year old was shooting my suppressed Weatherby Vanguard .30-06 with a 3-15x42 and 150 Nos BT (Her gun is a suppressed Rem 700 .308 Win with a 4-16x50 and 150 gr Nosler BTs, but we didn't get a chance to sight it in before youth season).
9 year old was shooting a suppressed Tikka T3 in .223 Rem (1:8) with a 2-10x42 and 55 gr. TTSX
Some observations over the years:
None of my girls have ever liked to shoot at a deer with the scope above around 8x. They say it makes it harder to find the animal and aim at a higher magnification. Even my oldest with the 3-9x42 at a doe 235 yards away last year wanted it on around 6x. Get a good 3-9 or 2-10, with a simple reticle.
The Bog Pod Death Grip is your friend. You can set it and forget it and even a relatively heavy gun is nothing to manipulate for a young child. I take a silver sharpie and mark the legs for each girl every fall when they sit in the blind so that if we move to different blinds or collapse for transport we know where to have it if we re-adjust in the dark. When/if they fall asleep in the blind, the gun stays up and ready. It also really helps reduce felt recoil.
I love the .223. It is a capable round. I am a little bit hesitant when they shoot it late in the evening. Blood trailing can be difficult. I have a 243 WSSM that I'm about to buy a suppressor for so that my little one can move over to that. In my experience the blood trails are better with a 6mm vs. 5.56. I know it's not a lot of difference in diameter, but that's my experience. If I were starting out now, I'd start at 243 Win and go up.
Stock fit is the most important. On thing that helped my girls was taking a piece of Kydex and heating it with a hair dryer over the cheek piece of the rifle. Then I had a light, simple, cheap adjustable cheekpiece that I could slide up and down and allowed their little faces better weld on the stock when behind the scope.
You can't go wrong with the Tikka T3x, Bergara B14 series (the Ridge is a little heavy), Ruger American, or Weatherby Vanguard / Howa 1500 in my opinion. All very well made and accurate.
243 Win, 7mm-08, 308 will all work well, with little recoil if done right and will flat out kill.