|
Joined: Jun 2011
Posts: 10,769
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Jun 2011
Posts: 10,769 |
They definitely don't have the best BC. My data shows a full minute plus at 1000 yards more wind drift (5.75moa with a high BC bullet vr. 7.1moa with the Partition in a 10mph wind) than a high BC bullet.
Anyone have any experience with them in their LR hunting rig?
The people wringing their hands over Trump's rhetoric don't know what time it is in America.
|
|
|
|
Joined: Feb 2011
Posts: 11,273
Campfire Outfitter
|
Campfire Outfitter
Joined: Feb 2011
Posts: 11,273 |
I know BobinNH shoots the 160 (maybe 175 NP?) out of his 7 Mashburn out to 600 yards very nicely.
I shot a buck last year with couple 7mm 140 NPs at 350 yards, not long range by any means, but they flew nicely and broke a lot of bones.
|
|
|
|
Joined: Jun 2011
Posts: 10,769
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Jun 2011
Posts: 10,769 |
Thanks Tanner, I've just worked a really accurate, no vertical dispersion, load for my .264 Winchester Magnum with the 140 Partition. 78.5 grains of WC-872 is giving an incredible 3200 fps.
The only thing I'm worried about is the extra drift at long range and how that may be a problem putting the bullet in the basket if the wind is tricky.
The people wringing their hands over Trump's rhetoric don't know what time it is in America.
|
|
|
|
Joined: Feb 2011
Posts: 11,273
Campfire Outfitter
|
Campfire Outfitter
Joined: Feb 2011
Posts: 11,273 |
How long are you planning on going?
|
|
|
|
Joined: Jun 2011
Posts: 10,769
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Jun 2011
Posts: 10,769 |
Let's not turn this into an "Ethics" thread! LOL!
I was just wondering if anyone has had any noticable problems hitting the target with the extra drift as compared to a high BC bullet.
I regularly shoot long range competition but I'm using a High BC target bullet like the Scenar or A-Max.
I'm sure it will be just an experience thing. Some guys even shoot .308's if you can believe it! Ya probably just have to get used to what kind of wind creates what kind of drift with that particular rifle/bullet combo.
The people wringing their hands over Trump's rhetoric don't know what time it is in America.
|
|
|
|
Joined: Feb 2011
Posts: 11,273
Campfire Outfitter
|
Campfire Outfitter
Joined: Feb 2011
Posts: 11,273 |
Oh no, I don't participate in ethics discussions. I was just going to run some numbers for you to provide an idea of what kind of drift and drop you'll see.
At any rate, I think that load will get it done as far as you can drop them in there!
|
|
|
|
Joined: Jun 2011
Posts: 10,769
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Jun 2011
Posts: 10,769 |
Thanks, but I know the numbers. If you compare the Scenar out of my Creedmoor to the Partition out of this .264, there is 12 more inches of drift at 1000 in a 10 mph wind.
Here's a real problem.
With my .264 shooting the 130 grain Scirocco compared to the same rifle shooting the 140 grain Partition, the Partition has 35 more inches of drift at 1000
The people wringing their hands over Trump's rhetoric don't know what time it is in America.
|
|
|
|
Joined: Feb 2011
Posts: 11,273
Campfire Outfitter
|
Campfire Outfitter
Joined: Feb 2011
Posts: 11,273 |
That's a bunch. How do the Sciroccos shoot?
|
|
|
|
Joined: Oct 2009
Posts: 5,197
Campfire Tracker
|
Campfire Tracker
Joined: Oct 2009
Posts: 5,197 |
That's a bunch. How do the Sciroccos shoot? The load I "threw together" before my grizz hunt. They shot the same POI as my 130 VLD load and virtually the same to 600 meters. I think I'll kill a few more critters with it this fall just for grins....
Luck....is the residue of design...
|
|
|
|
Joined: Feb 2011
Posts: 11,273
Campfire Outfitter
|
Campfire Outfitter
Joined: Feb 2011
Posts: 11,273 |
That's a sleek looking bullet there Pat. The load sure does look thrown together..grin
|
|
|
|
Joined: Oct 2009
Posts: 5,197
Campfire Tracker
|
Campfire Tracker
Joined: Oct 2009
Posts: 5,197 |
Swift claims a .571 G1 BC.....I haven't had a chance to shoot it past 600 yet, but I'm saying it has to be pretty close. I'm jumping it 5 thou. At 10 it was all over the paper.
Luck....is the residue of design...
|
|
|
|
Joined: Feb 2011
Posts: 11,273
Campfire Outfitter
|
Campfire Outfitter
Joined: Feb 2011
Posts: 11,273 |
That's dang close to A-Max territory!
I've heard things similar to what you've said, that they're the ultimate 'picky' bullet. But of course they'll shoot knots out of a GAP!
|
|
|
|
Joined: Jun 2011
Posts: 10,769
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Jun 2011
Posts: 10,769 |
Hey SS! The reason I went with the partition was that the scirocco stopped shooting in my .264. I had some throat erosion and moved it out to where it was in the first place in relation to the lands (.030" off) but it still didn't work.
I haven't tried them as jammed as you have and might have to do some more work to see if they'll shoot there!
Thanks!
The people wringing their hands over Trump's rhetoric don't know what time it is in America.
|
|
|
|
Joined: Oct 2009
Posts: 5,197
Campfire Tracker
|
Campfire Tracker
Joined: Oct 2009
Posts: 5,197 |
Rick, as well as you shoot, you won't have any problems killing anything you shoot with that .264.
Sometimes the bearing surface is quite differnt with scirroco's from lot to lot. The first box I tried in my .260 shot lights out loaded to 2.775" coal. The next box shot like ass with the same coal. I checked the base to ogive and it cured right up.
Luck....is the residue of design...
|
|
|
|
Joined: Jun 2011
Posts: 10,769
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Jun 2011
Posts: 10,769 |
Thanks Pat. I think I'm gonna stick with the Partition for now. I've got a great elk hunt in October.
I tried the 129 Interbond after the Swift took a crap and couldn't get it to shoot either. I tried my Scenars and they shot great, so my equipment was good, just needed a new bullet. Both the Scirocco and the Interbond have more of a secant ogive. The Scenar and Partition have a more tangent ogive and they shot better.
I kinda figure that to make the Scirocco shoot may take some rounds down the bore, more erosion, just in time for things to change in the throat screwing up accuracy before my hunt.
I think the reason for it being finicky is the shape of the ogive
The people wringing their hands over Trump's rhetoric don't know what time it is in America.
|
|
|
|
Joined: Nov 2010
Posts: 1,015
Campfire Regular
|
Campfire Regular
Joined: Nov 2010
Posts: 1,015 |
Here's a real problem.
With my .264 shooting the 130 grain Scirocco compared to the same rifle shooting the 140 grain Partition, the Partition has 35 more inches of drift at 1000 Did you actually compare them by shooting out to that range? I would be more concerned about the bullet mushrooming at that distance. BTW I am getting excellent accuracy out of 175gr Partitions with my 7mm RM out to 500 yards. I will be doing some more testing at longer ranges come springtime.
|
|
|
|
Joined: Nov 2010
Posts: 1,015
Campfire Regular
|
Campfire Regular
Joined: Nov 2010
Posts: 1,015 |
Swift claims a .571 G1 BC.....I haven't had a chance to shoot it past 600 yet, but I'm saying it has to be pretty close. I'm jumping it 5 thou. At 10 it was all over the paper. According to Bryan Litz the G1 BC is .491
|
|
|
|
Joined: Jun 2011
Posts: 10,769
Campfire Outfitter
|
OP
Campfire Outfitter
Joined: Jun 2011
Posts: 10,769 |
Here's a real problem.
With my .264 shooting the 130 grain Scirocco compared to the same rifle shooting the 140 grain Partition, the Partition has 35 more inches of drift at 1000 Did you actually compare them by shooting out to that range? I would be more concerned about the bullet mushrooming at that distance. BTW I am getting excellent accuracy out of 175gr Partitions with my 7mm RM out to 500 yards. I will be doing some more testing at longer ranges come springtime. Haven't shot them side by side or one after another under the same wind conditions, just relying on Ballistic FTE's output which has been on the money. BTW, the G7 of the Swift Scirocco is .271 according to LITZ and Ballistic FTE. the G1 is for flat based pointed bullets and is not as accurate for a secant ogive, boat tail like the Scirocco. .571 BC is Pretty close!
The people wringing their hands over Trump's rhetoric don't know what time it is in America.
|
|
|
|
Joined: Nov 2010
Posts: 1,015
Campfire Regular
|
Campfire Regular
Joined: Nov 2010
Posts: 1,015 |
rcamuglia - Yes, you are right that the G7 is better for bullets of the Scirocco's design. I was just pointing out that Litz's data on the G1 is not nearly as high as the factory claims. I am using Nightforce's calculator and on there Litz's G1 is given at .491 and G7 at .251
I was curious because there is no Litz data for the 140gr Partition, so I thought perhaps you had done the testing, which would allow me to figure out the Partition's G7....that's all.
|
|
|
|
Joined: Feb 2007
Posts: 16,512
Campfire Ranger
|
Campfire Ranger
Joined: Feb 2007
Posts: 16,512 |
Well we know one author killed over 600 yds using a 129 in a Creedmoor - on elk. I'd bust one to 400 no doubt, in my 260 using my 130 AB 'go to' load, or even a 129 SP. Shot placement would be paramount, but suffice to say I am not the one who chooses BC as the #1 criteria for a hunting bullet, nor do I hunt 400+ yd routinely.
Seems dicey running bullets that vary that much box to box - those SSIIs sure seem fickle.
|
|
|
|
670 members (1minute, 12344mag, 1eyedmule, 10gaugeman, 1beaver_shooter, 10ring1, 64 invisible),
3,092
guests, and
1,282
robots. |
Key:
Admin,
Global Mod,
Mod
|
|
Forums81
Topics1,190,698
Posts18,456,728
Members73,909
|
Most Online11,491 Jul 7th, 2023
|
|
|
|