Ballistic Coefficient - doesn't matter for hunting

[chuck nelson]

Here's some way cool stuff that will surely make the 6.5 sniper crew cringe.

60 years of separation and 30 degrees in common. Talk about cool.

I’m going to start calling the cartridge on the right the 6.5 Mx4 ie MM Mini Mash. It might save a few forehead veins.

 

[rascal1]

Any of you guys handloading the 6.5CM pushing the velocity higher than factory ammo seeing a bit flatter trajectory? I have one for range only, considering a rifle in same chamber for deer hunting only. Not seeing any advantage inside 400 yrs or so over a 243 or 25-06 for flat shooting hard hitting round....

 

[LittleBoyLefty]

Careful you will have Supercub scouring the EE for a 28 Nosler.

LOL. Hilarious, because it's true.

 

[FLHTCUI]

Well put, and a good tact for the vast majority of the hunting group.

Big holes in game will make them leak and succumb sooner or later.
BC is not a replacement for poorly aimed bullets.
Rob

 

[rascal1]

Any of you guys handloading the 6.5CM pushing the velocity higher than factory ammo seeing a bit flatter trajectory? I have one for range only, considering a rifle in same chamber for deer hunting only. Not seeing any advantage inside 400 yrs or so over a 243 or 25-06 for flat shooting hard hitting round....

Nobody has a response?

 

[SuperCub]

LOL. Hilarious, because it's true.

I don't see one of those big Noslers in my future. My magnum days are almost done. I'll never say never, but the only magnum I have now is the 300. If that goes, I'll fall back to my 280 or a 30-06 as my "big gun".

I'm looking forward to getting that 6mm CM going. I won't be using RN bullets in that.

 

[WhelanLad]

Any of you guys handloading the 6.5CM pushing the velocity higher than factory ammo seeing a bit flatter trajectory? I have one for range only, considering a rifle in same chamber for deer hunting only. Not seeing any advantage inside 400 yrs or so over a 243 or 25-06 for flat shooting hard hitting round....

lets assume the answer is No, an that ther is no advantage between the 6.5 or the latter
its marketing hype

 

[SuperCub]

its marketing hype

Anytime any new product is launched, marketing hype in introduced into the mix.

The CMs don't offer much over existing chamberings except being able to fit into a short action with longer bullets and better factory ammo offerings and factory rifles with faster twists. Those attributes are not hype.

 

[LittleBoyLefty]

BC is not a replacement for poorly aimed bullets.
Rob

Neither are big holes. Nothing makes up for a bad hit. That's the beauty of high BC projectiles tho, a lot more forgiving of environmental factors.

I don't see one of those big Noslers in my future. My magnum days are almost done. I'll never say never, but the only magnum I have now is the 300. If that goes, I'll fall back to my 280 or a 30-06 as my "big gun".

I'm looking forward to getting that 6mm CM going. I won't be using RN bullets in that.

Just funning ya.

And I agree. My 'big gun' is already a lightish 30-06. I like to shoot often and in volume. Anymore, I just have no patience for anything more than a big 7.

JC just shipped the barrel for my 6CM. Looking forward to it also!

 

[LittleBoyLefty]

Nobody has a response?

If 'fast and flat' to 300-400 is your top priority, there won't be a lot between any of them with 100-110 grain bullets.

 

[woodchopper]

28 Nosler isnt effected by gravity

well now that settles it.... I need a 28 Nosler.

 

[rascal1]

If 'fast and flat' to 300-400 is your top priority, there won't be a lot between any of them with 100-110 grain bullets.

K, good response. Thx

 

[todbartell]

Any of you guys handloading the 6.5CM pushing the velocity higher than factory ammo seeing a bit flatter trajectory? I have one for range only, considering a rifle in same chamber for deer hunting only. Not seeing any advantage inside 400 yrs or so over a 243 or 25-06 for flat shooting hard hitting round....

apples to apples with the same projectile, the faster you push the bullet, the less bullet drop it will have. Rather than hot rod a cartridge I would look at a larger capacity case that will get more velocity without high pressure

 

[9.3mauser]

Ran some numbers for the Hornady 180 gr. round nose ( s.d. .241) compared to the Hornady BTSP of the same weight ( s.d. .452). Using a velocity of 2700 and a 200 yard zero, the difference in drop at 250 was 0.9"; at 300 2.6"; at 350 5.4"; at 400 9.7". So if you're shooting 300 yards or less, then no, ballistic coefficient doesn't matter.

 

[LittleBoyLefty]

Ran some numbers for the Hornady 180 gr. round nose ( s.d. .241) compared to the Hornady BTSP of the same weight ( s.d. .452). Using a velocity of 2700 and a 200 yard zero, the difference in drop at 250 was 0.9"; at 300 2.6"; at 350 5.4"; at 400 9.7". So if you're shooting 300 yards or less, then no, ballistic coefficient doesn't matter.

I understand what you're saying, and agree to a point. But BC isn't just about drop. For those of us who live and hunt in windy areas, it's more about slipping the wind. Trajectory is a constant and easy to compensate for- wind is anything but constant or predictable, and the higher BC projectiles perform significantly better in the wind. Even under 400.

 

[LongBomber]

Ran some numbers for the Hornady 180 gr. round nose ( s.d. .241) compared to the Hornady BTSP of the same weight ( s.d. .452). Using a velocity of 2700 and a 200 yard zero, the difference in drop at 250 was 0.9"; at 300 2.6"; at 350 5.4"; at 400 9.7". So if you're shooting 300 yards or less, then no, ballistic coefficient doesn't matter.

What was the difference in velocity and energy of those two combo’s? Same bullet weight and speed so numbers at the muzzle should match, how much difference at 100 yards?