Home Forums Hunting & Shooting Custom Rifles & Wildcats .280 Ackley Improved,,your thoughts please….

I've yet to suffer my first BC "failure"(in over a million tries),but I've sure as fhuqk had LOTS of scopes puke. Hint.

'Course,I actually shoot. Hint.

Fhuqking LAUGHING!.............

Is this a difficult question to answer?

What is the wind difference, of known BC, at 400 yds.?

Or drop, for that matter?


BC's only real value is Energy down range.

... and the .270 Win., even w/ flat based PSP bullets like the 150 gr. NP, has plenty for most game, even at 400 yards.


BC - is a placebo for marksmanship.




GR

Stick clearly answered your question using the 338-06 as a model a few posts ago

My thoughts are get what YOU want....these discussions go south pretty quick

LOL, Truth.

You asked for recommendations and got good answers, just don't expect everyone will agree with one another. As far as "going south", you already knew these type of questions lead to that.

I still don't know what a 6.5 queermore can do that a 280ai can't, besides fit into a short action. What's the difference in wind drift between a bullet traveling 2700fps with a 600 bc compared to a bullet traveling 3000fps with a 500 bc at 400 and 500 yds? Stick to facts stick.

We're talking 280ai not 338-06. Stick deflected like he always does when he doesn't like what the facts say.

Kenneth, I built a 280AI a few years ago. Had an itch for a custom on M70 Classic Stainless. After shopping for a long time with no luck finding a short action, I settled for a long action and built the 280AI. It shoots great. 140 BT’s over RL22 & RL23 at 3200 fps, and 150 ELDX over RL26 at 3100 fps are exceptionally accurate in this rifle. Haven’t done much load development for 162’s but I’m sure it’ll stack them nicely……but that is kinda where the shine starts to get a little dull. Recoil of of a 162 at 2900ish is pretty stout. Also, the rifle is a bit heavy for my liking at just over 8.5 lbs scoped and empty. Those 140 & 150 loads work well, although not tried to run the ELDX into a shoulder at 100 yards from a 3100 fps start, but I can get equally good performance out to 500 yards with less powder, recoil and weight. That leaves the 162+ pills as the only options that seem to offer advantages to me.

All that said, if you need to scratch an itch, it’s a good killin cartridge, but personally, I wouldn’t do it again.

His chart shows it pretty well

250’s started at the same speed.

.247 BC drifts 31” and has 1050 FTLB at the 400 yard line.

.648 BC drifts 9.7” and has over 2300 FTLBs at the 400 yard mark.

Why did he use the G1 on one example and the G7 on another?

Serious question,

But that doesn't answer the question.

Now, given, say, a flat-based .270 Win/150 gr. NP (BC= 0.465) at 2900 fps at the muzzle and a 200 yd. zero.

At 400 yards, w/ a full deflection 10-knot wind, it's:
- doin' 2150 fps.
- carryin' 1540 ft-lbs.
- droppin' 21 in.
- blowin' 12 in.

As both the velocity and energy are adequate for that bullet?

... I'm only correcting for the drop and wind.

How does a little extra BC change that?


Correcting less - doesn't replace correcting correctly.

BC - is a placebo for marksmanship.




GR

No clue, maybe that’s what he had loaded in the profile for his gun.

Numbers remain the same though with either factor.

If you can judge a 7MPH wind or a 14MPH wind every time, right on the money, you’re right, adding BC makes no difference cause you’ve got it licked.

At what range does the actual difference between the BC's matter, and at that point, how critical is the wind call for even the higher BC bullet?

... and is a prudent, ethical hunter shooting at that range?

400 is already way the hell out there.




GR

What precisely do you think the word “placebo” means?

I don’t get into what’s ethical for others with more gear.

But the wind may be nil where your shooting from, but your bullet has to cross a several hundred foot deer canyon and connect with the buck or bull on the other side.

Wind is stronger the higher above the ground you get, but might not be much from where you’re triggering the shot, so having some margin in being able to slip the wind isn’t a bad thing.



The bullet has to travel over a few different wind streams to get to the far side. Having some forgiveness is helpful.

Amen.
I’ll take all the extra margin I can get. Enough other shít can go wrong that if I can decrease my wind deflection by 100% or more, I’ll greedily take such an easy reality.

This

I'll take any edge I can get, even on 350 to 400 yard shots. At those distances where I hunt the wind can be shifting dramatically between me and my target.