How many is enough for load

[Bassfish1952]

I'm a fan of the 6Arc for sure, but at your distances and hunting times, and grandson, I would highly recommend you look at a 6mm Creedmoor.  I got a ruger predator, 22" barrel, 6mm Creed, put a magpul stock on it and a good vortex scope, and that is a rifle I had no problems with taking deer, plus it's the rifle my 2 grandsons fell in love with - taking the older one hunting with it next month.

Also the 6CM has iirc some 90 gmx/lead free bullets factory loaded.
I'm using the 103 Eldx, load it to about 2890-ish and it's a laser beam.  Not the hottest node but really good MV-wise.
The predator is heavy enough to buffer the recoil but not too heavy, the younger grandson was hitting <1"/ 100 yds when he was 10 with it. Actually both of them were hitting that well. And economical to get into.
I've also got one of those tripod/clamp thingys we're going to try with it.

Like I said I love the 6Arcs I have, but for shooting good-sized animals to 300 I'd bring my 6CM along for sure.

Thanks
I have a 6.5 CM but that little CZ527 keeps calling. Once I get the barrel back and have time to really shoot it , we'll see but all the numbers say out to 300 should be no problem with 103ELD-x or a load with the 90gr CX or GMX.I always take a backup in case of a problem with primary gun. So I will have the CZ557 on hand and thinking ahead I bought a Savage AxisII in the youth model 6.5CM just in case . 
So I will focus on 6ARC and 6.5 CM for now.
I shoot the Hornady Superformance in 120gr GMX and CX in the 6.5CM and have been impressed with it , one reason I want to try it in the 6ARC and have been stocking up on those along with getting to stuff for the 6arc. 
And I have another Great grandchild on the way so who knows maybe 2 little hunters in the family soon no forcing but just hope, I enjoy the hunting and my fishing so if I can interact with kids, grandkids and great grand kids too it would give me a comfort zone with them, always a good thing.