Thanks, sending a PM.

Chuck

quote:

Originally posted by skl1:
About the wind: it's one of the reasons I like the .300 UltraMag (or any of the other hated overbore magnums) for longer range shooting where you have to calculate and compensate for windage. It shoots flat with big, heavy wind-cheating 180grain Nosler Partitions.

Steve

Your chosen bullet (asuming 3250 fps MV) drifts only 4" less than a .264" 140 gr. Partition with a 2700 fps MV at 500 yds with a 10 mph full value x-wind.

<1 MOA advantage, not exactly what I call convincing.

I have killed many mule deer and antelope at ranges of 300 to 400+ all with a 270. A few have required a 22 in the head to finish the matter but most were DOA when I finished the hike to the animal. The key here is to actually practice at long range. I hunt rock chucks at the tree line with my 270 using the same load that I use for deer, very informative. The 270 is a bit cheaper to shoot but that's not the real point, lack of heavy recoil is the main factor. My No. 1 weights in at 10 pounds with a Burris 3x9 Ballistic reticle. Heavy yes, low recoil, very. Can you shoot 50 rounds of 300 win with 180's with your rifle in a day? how about 25? Pull the tigger a lot at 450 yards and you will learn just how far that really is. Wind deflection is subject to time of flight so higher V's help here but winds can be fickle, blowing softly where you stand and still at the target but howeling up the canyon that is between you and your target. The 3 important points here are Practice, practice and of course practice. Sighting your rifle in for 400 yards makes no sence if you never take practice at that range. Just IMO but I've actually done this a bit.

HunterMontana, very good points.

Once, while practicing prone shooting from the 600 yard line at my club, a guy stopped in to ask about joining. He was simply besides himself when he found out that I and my mates were hitting a 2 MOA bullseye consistently from 600 yards using AR15s with iron sights, 223 Remington ammo (with appropriately heavy bullets however) and nothing but a sling, shooting coat, and our arms for rifle support.

Once the distance is known, bullet drop becomes irrelevant if the cartridge's trajectory is known. The wind, however, is not as easily dismissed, as you have correctly pointed out.

Also, most people who don't regularly shoot past 100 yards have a huge difficulty estimating distances. Invariably, hunters that are not target shooters stand at the 300 yard line of my clubs highpower rifle range and overstimate the distance by at least 150 yards. I also get a kick of showing them what a 36" black aiming black looks like from 600 yards away. They simply cannot believe what they see.

Of the two, I would choose the .300 RUM. Several companions use it (mosly in the Rem 700 LSS persuasion) and it is a very impressive and accurate round. Certainly more than is needed for deer sized critters, but if that is what floats your boat, I don't see anything wrong with it.

-Lou

Like the saying goes "You can eat right up to the hole!!"

Personally, I've never noticed that big a difference between the exit holes of a 270 or a 300 mag. Those 2 are steak and potatoes to me and all the rest are just cake and ice cream. That is, unless you are shooting at varmints or dangerous game.

quote:

Originally posted by HP Shooter:

quote:

Originally posted by skl1:
About the wind: it's one of the reasons I like the .300 UltraMag (or any of the other hated overbore magnums) for longer range shooting where you have to calculate and compensate for windage. It shoots flat with big, heavy wind-cheating 180grain Nosler Partitions.

Steve

Your chosen bullet (asuming 3250 fps MV) drifts only 4" less than a .264" 140 gr. Partition with a 2700 fps MV at 500 yds with a 10 mph full value x-wind.

<1 MOA advantage, not exactly what I call convincing.

Good point, but looking at the cheatsheets I always print out from my ballistics program, the difference between the RUM and the lighter rifle I brought (.243 w/ 95 grain BT's) was enough that I brought the RUM out on a particularly windy day, even though we were after springbok.

But remember, while I had a rangefinder, I was using the military grass movement/small limb movement/big trees movement method of wind estimation. And I had to estimate the drop between the nearest two 50 yd intervals I'd memorized. And likewise I had to use the 10 mph increments at 3 o'clock I'd memorized along with actual wind direction to estimate windage, so a 20% or so advantage seemed significant.

Steve