390 grain Hornady A-Tip load development 375 Cheytac
- Thread starter secondofangle2
- Start date
I think the 568 is the large kernels like 570.
I run a 375 Rum improved, I've got some 568 to try with the 390 A-tips but I haven't opened a bottle yet.
I run a 375 Rum improved, I've got some 568 to try with the 390 A-tips but I haven't opened a bottle yet.
Ya I think it's gonna be a good spot.
In my case My load is essentially a case full of 570. I can get more speed before I see any alarming pressure signs but the ES/SD seems to go to shit once I start crunching powder. I'm hoping with the 568 I can run up at those higher velocity and still have low ES.
N568 seems to work well in the cheytac with 390 a tips. New 34 inch 10 twist barrel. Shot to 2365 today. So far so good. Adjusted the bc some to lign up at distance.
For a 34 inch barrel that velocity is what I would expect.
If you switch to solids it will be faster
If you switch to solids it will be faster
I'm using .497 and that seems to work for me in a 10 twist
careful with "truing" your BC because sometimes the BC becomes a scapegoat for inaccuracies in range (beam dispersion), scope tracking bias (often unmeasured or measured inadequately to identify small errors), or velocity (less of an issue now that we measure each shot with Garmin), or other input errors.
careful with "truing" your BC because sometimes the BC becomes a scapegoat for inaccuracies in range (beam dispersion), scope tracking bias (often unmeasured or measured inadequately to identify small errors), or velocity (less of an issue now that we measure each shot with Garmin), or other input errors.
Bertram brass 375CT for sale in PX if anybody wants any. <$2.50 per case.
www.snipershide.com
Reloading Equipment - Bertram Brass 375 Cheytac 375CT New 134 pieces
This is the correct size brass, not the malformed. Correct base to datum/shoulder sizing. There are 112 pieces in the box pictured, plus 22 pieces unfired and primed with 215M that were loaded and then bullet pulled without firing. $350 shipped/insured for all. Selling because I’m having a WTC...
www.snipershide.com
I’ve heard N568 runs well in the 375 Enabler and I’m glad to see it works well with the Cheytac. I’m going to run some numbers, but do you mind sharing where you started your load? Looks like we’re running similar set ups with barrel length and twist. Thanks!
I’ve heard N568 runs well in the 375 Enabler and I’m glad to see it works well with the Cheytac.
Good point. My barrel is not!
Silly question...I've got some 365gn Badlands Super Bulldozer-2s and the a-tips. I was considering loading the bulldozer's, but I don't think N568 and a 1:10 twist will work too well here?
don't know about the twist, put it into a calculator and see what the SF is for your specific altitude and velocity, and how far you want to shoot them (past transonic?)
N568 would be fine for 365 grain class I would think, guys use RETUMBO and N570 for the 350-365 class
N568 would be fine for 365 grain class I would think, guys use RETUMBO and N570 for the 350-365 class
I just learned of this from you thanks! So glad we're getting more options for jacketed bullets in 375
but with G7 .475 and 410 grains, it will barely keep up with the 390s. I wonder if it's going to be easy to load for and what kind of jump it will like and how fast people get them going and with what powder....maybe I'll have to give them a try.
but with G7 .475 and 410 grains, it will barely keep up with the 390s. I wonder if it's going to be easy to load for and what kind of jump it will like and how fast people get them going and with what powder....maybe I'll have to give them a try.
Yea they said there really easy to tune but yea b hard to beat the a tips. Some guys r die hard berger tho
The Lothar-Walther DT barrels 1800+ rounds
My Lilja with n570: 800-1000 rounds
On average I’d expect 1200-1500 but depends on barrel material, how hot you run it (strings of 3,5,10?) and what load/powder youre shooting. Dunno if solids/jacketed makes a difference
My Lilja with n570: 800-1000 rounds
On average I’d expect 1200-1500 but depends on barrel material, how hot you run it (strings of 3,5,10?) and what load/powder youre shooting. Dunno if solids/jacketed makes a difference
You will get over 1000 rounds easy w h50
I run about .002-3 neck tension. No AMP press. Very little force w annealing and line on the bullets
I run about .002-3 neck tension. No AMP press. Very little force w annealing and line on the bullets
What velocity are you getting? How long is the barrel?
My friend is getting 2870fps, 30”barrel with 133gr H50, i will run same identical setup. Will see if i will have to tweak load or not.
2440 Rounds with Factory LW barrel...
Official (DTA) SRS, HTI, Covert, Hunter Thread
Yep Hah! Just because I have the same thing in my office.
www.snipershide.com
Your load was about 133 grains of H50BMG right? Didn’t you run the ATIPs at 2870 or 2880?2440 Rounds with Factory LW barrel...
Official (DTA) SRS, HTI, Covert, Hunter Thread
Yep Hah! Just because I have the same thing in my office.
Thats impressive!2440 Rounds with Factory LW barrel...
Official (DTA) SRS, HTI, Covert, Hunter Thread
Yep Hah! Just because I have the same thing in my office.
30” barrel brand new.
136gr H50 2830fps
Temperature 8F
Humidity 40%
So will see if barrel will speed up this is first 25 rouds. But it’s grouping 5 rounds half Moa.
136gr H50 2830fps
Temperature 8F
Humidity 40%
So will see if barrel will speed up this is first 25 rouds. But it’s grouping 5 rounds half Moa.
That’s right about where you want to be. I am at 1:35 grains in a 35 inch barrel clocking just over 2900 and you figure about 20 ft./s per inch.
If you have tight groups and a low standard deviation there, I would stay put because you’re gonna get into pressure above that and ruin some expensive cases
If you do go higher, I would use the same case over and over
If you have tight groups and a low standard deviation there, I would stay put because you’re gonna get into pressure above that and ruin some expensive cases
If you do go higher, I would use the same case over and over
Thanks for the help. Barrel should settle I'm assuming around 130 rounds?
