Would that be flatter shooting than the 6.5-300 Weatherby Magnum at 500 yards and 1000 yards?
Backfire on YT has a video showing the flattest shooting cartridges, 6.5-300 is at the top...
What would be a better elk and moose gun between the two?
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What is the the most flat shooting cartridge yall can think of?
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Backfire on YT has a video showing the flattest shooting cartridges, 6.5-300 is at the top...
What would be a better elk and moose gun between the two?
Backfire is wrong more than he's right lolWould that be flatter shooting than the 6.5-300 Weatherby Magnum at 500 yards and 1000 yards?
Backfire on YT has a video showing the flattest shooting cartridges, 6.5-300 is at the top...
What would be a better elk and moose gun between the two?
6.5x300 WBY
Well-Known Member
But I think he is correct here. For production non wildcat rounds like Allen's
Don't know anything flatter. But I don't know every cartridge out there
6.5x300 is definitely flat. 26noz or 28noz are in that bunch also along with 257wby
lyle2231
Well-Known Member
.243 Rhine. 7mm Mag necked down to.243. Quite the over bore.
A buddy had one, about 150 -200 rounds barrel life so make 'em count!
Haha yeah I don't think I'll swim in that creek. 200 rounds isn't very much to work with
JamesWilson5
Well-Known Member
7mm rum with 1 8 twist rate hand loads
If you've got an adjustable stock or a chassis with 0 drop you could mount the scope way above the bore (2.5" or so) like is done with an AR and the rifle will appear to shoot flatter due to the extra ~1" between the center of the bore and center of the scope.
JamesWilson5
Well-Known Member
From point blank till u had to adjust the scope a 22 250 is very flat
fseaman.js
Well-Known Member
This has long been an interest of mine. Ballistics solutions and "flat" I include the subsonic transition. I was going to start a thread on the subject on this, no need, it's here. I have not read this entire thread, yet...
So, separate from this I had been looking at Ron Spomer's "Flattest". He has 3 videos and 2 blog posts that explains a lot more. He publishes bullet weight, fps and BC and of course drops in inches at yardage. 300, 500 and 1000. I was able to find the site Ron used for his ballistics calculation, I entered his numbers and get exact same solutions. Ron Spomer's data can be reviewed. I used my "favorite" ballistics calculator to compare to the one Rom Spomer used. They are pretty close and match "Applied Ballistics" solutions pretty close. The calculators I use are:
JBM - Calculations - Trajectory
ShootersCalculator.com | Ballistic Trajectory Calculator
Calculates the ballistic trajectory of a bullet fired from a rifle, handgun or other firearm. Produces a ballistic trajectory chart and table that shows the drop, velocity, kinetic energy, windage, and trajectory of a bullet.
Backfire publishes only 500 yards, 1000 yards and the FPS but he doesn't publish bullet weight or BC. This makes it so the it Backfire's data can't be reviewed. His numbers seem inflated to me as I can find to bullet that gives the same results. "Spinning high B.C. bullets at faster speeds allows the projectile to get to the target sooner" is incorrect. Though spin and B.C. do influence the ballistics solution it does not "allow it to get there sooner" but we don't have his data to determine if it's true.
For both authors, they specify "production" cartridges though not necessarily production ammo. Both agree on couple things, speed does not equate to flat. The 6.5-300 Weatherby Magnum is the flattest at 1000 yards.
I have a something else that interests me. How time of flight indicates flat. In Ron Spomer's articles he adds the 240 Weatherby Magnum to the list. At 300 yards of this is flatter than the 6.5-300 Weatherby Magnum, not by much but a little. Numbers are numbers.
Has anyone done any testing of the 7mm RUM with a 1:8" twist to find out? Could a 7mm RUM be flatter shooting than a 6.5-300 wby with hand loads at 500 yards and 1000 yards?
fseaman.js
Well-Known Member
ThisTwist rate could allow a bullet to get to 1,000 yards sooner. Too little twist can lower the BC. Lower BC would cause loss of bullet speed and the bullet would arrive latter. But not by much.
Flat is all about high muzzle velocity and bullet BC. Flattest will be the bullet that gets to distance in the least amount of time.
I would think that a 7 RUM could be as flat as a 6.5-300. Both are about the same overbore so could get the velocity. It's all going to depend on the bullet BC and velocity combination. The 7 RUM shooting a 180 Hornaday ELDM with about 0.4 G7 BC should have a chance against 6.5-300 shooting the highest BC 6.5 bullets. No 6.5 bullet that I've seen approaches 0.4 BC.
Flat is all about high muzzle velocity and bullet BC. Flattest will be the bullet that gets to distance in the least amount of time.
I would think that a 7 RUM could be as flat as a 6.5-300. Both are about the same overbore so could get the velocity. It's all going to depend on the bullet BC and velocity combination. The 7 RUM shooting a 180 Hornaday ELDM with about 0.4 G7 BC should have a chance against 6.5-300 shooting the highest BC 6.5 bullets. No 6.5 bullet that I've seen approaches 0.4 BC.
Chip_Shot
Well-Known Member
A slow twist 22-250 or 220 swift comes to mind.
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