Just did single shot ladder to see what velocity I could expect. Really didn’t expect that high with 4831sc. I’ll roll with it though and check couple areas with 5 shot groups next outing and report back
What COAL did you use. Hornady listing 3.070 for 162-166. I did that on first round and it looks wildly too deep. I backed it off to have the bottom of bullet just below the shoulder/body junction.
73gr n570, Peterson brass, cci250, 2.5935 cbto. Seems to be hanging around 2850fps out of my 18”.
Obviously work up to the 73gr. I started around 69gr and found great accuracy all the way up to 73.5.
900 (3 shot) and 1000 (4 shot) yard groups attached.
Attachments
How’s the ADG brass to those pressures? I’m using Petersen which seems to be holding up good. Pushing 3050 from a 22” barrel (69g n560) slight extractor smear. Heavy bolt at anything over 3050 on this gun. Hornady brass primer pockets are done after 1 firing 
For reference Hornady match 180 shoots 2860
For reference Hornady match 180 shoots 2860
I haven’t tried the ADG with the n570 load. Was using h1000 for that and didn’t push it at all. The Peterson is holding up greatHow’s the ADG brass to those pressures? I’m using Petersen which seems to be holding up good. Pushing 3050 from a 22” barrel (69g n560) slight extractor smear. Heavy bolt at anything over 3050 on this gun. Hornady brass primer pockets are done after 1 firing
For reference Hornady match 180 shoots 2860
I have some individual pieces of brass that are able to be seated with primers on my priming tool with very light pressure compared to normal seating force. These were probably reloaded from top of some exuberant ladder testing that was nearly done with a 2x4 to get the bolt to open.How’s the ADG brass to those pressures? I’m using Petersen which seems to be holding up good. Pushing 3050 from a 22” barrel (69g n560) slight extractor smear. Heavy bolt at anything over 3050 on this gun. Hornady brass primer pockets are done after 1 firing
For reference Hornady match 180 shoots 2860
I’ve only just reprimed my once-fired ADG. A few of them from pressure testing were quite spicy with slight extractor smear and tough extraction. So far no issue with primer pockets, but it’s really kinda early for me to tell.How’s the ADG brass to those pressures? I’m using Petersen which seems to be holding up good. Pushing 3050 from a 22” barrel (69g n560) slight extractor smear. Heavy bolt at anything over 3050 on this gun. Hornady brass primer pockets are done after 1 firing
For reference Hornady match 180 shoots 2860
I’ve settled on 67.3gr Retumbo under 190s for 2920.
22” Carbon Six. 80-85 degrees outside. 900 ft altitude.
Peterson, GM215M, Berger 175 EH, N570
5 shot group - 73.7gr - 3107 avg , 6.5 SD, 18.4 ES
For comparison, I got 2871 fps avg from factory Hornady ELD-X on the same day.
Peterson, GM215M, Berger 175 EH, N570
5 shot group - 73.7gr - 3107 avg , 6.5 SD, 18.4 ES
For comparison, I got 2871 fps avg from factory Hornady ELD-X on the same day.
Okay, before my lazy ass goes through 15 pages of this thread again, has anyone had success with Berger 195 gr EOL Elite Hunters at ELR distances? If so, please do let me know.
My friend with a long throated 300 WindBag is kicking my ass past a mile with 220-240gr projectiles and that just must be answered.
I have some solids that I haven’t yet tried but, they are harder to spot impacts without a camera.
My friend with a long throated 300 WindBag is kicking my ass past a mile with 220-240gr projectiles and that just must be answered.
I have some solids that I haven’t yet tried but, they are harder to spot impacts without a camera.
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I'm running adg up to 3,014 with 180 eldm and retumbo....which is making a slight smear from extractor. But I'm running a Christensen mpr 26" CF which even factory Hornady match ammo has worse extractor marks. I'd go with adg for sure.How’s the ADG brass to those pressures? I’m using Petersen which seems to be holding up good. Pushing 3050 from a 22” barrel (69g n560) slight extractor smear. Heavy bolt at anything over 3050 on this gun. Hornady brass primer pockets are done after 1 firing
For reference Hornady match 180 shoots 2860
Just returned from a week of elk hunting with the 7prc. A very unsuccessful week. I will be exploring other bullets for this rifle. Barnes/nosler, here I come.
I realize they aren’t specifically a hunting bullet, but the Barnes 177gr shot really well in mine. 10 at 200:
And yes, I realize that my windage was off, but I was verifying a load and didn’t want to change during the string.
Curious what happened, unsuccessful because you didn't get a shot, or did you have bullet problems?
Shot 3 bulls. Details/shots below were witnessed and verified by 2 guides.
First was at 425yds. Right of shoulder. Thing dropped, rolled down hill, and then put all 4 legs in the air for several mins. As we were packing up to go get it, it stood up and ran away. No blood trail. hiked for hours to find him, couldn't get him back.
Second, whacked at 800yds, same spot. It fell down 50 feet on hill. Got up, ran behind brush and no blood trail at all. Hiked all day to find him, couldn't find him.
Third - 400 yards Texas heart shot. Plugged his ass. Sat there for a few mins, we thought he was dying/dead. He got up and walked out. No blood trail. HIked ALL Day, literally 7 hours, couldn't find him.
Terrain, hills and trees, did not allow for follow up shots once we saw them pop up.
Hate that you had to deal with such a bad situation but really hope this was 3 separate hunters and not 1 hunter with 1 tag..
What bullet?
Edit- assuming it was the 175 eldx?
I'll put my question for you all at the top here:
I'm curious about N570. I know guys are having great luck with that. How is the Temp stability? I'm seeing N560 loose 1fps per degree drop from 85-40 degrees. Which is disappointing.
Second question is about primers. I just can't seem to get my velocity spreads acceptable even being very particular and double weighing every powder charge. I'm beginning to suspect the CCI O.E.M 250 Magnum rifle primers I got in a plain white box labeled "not for resale" are not very good. Maybe they're belt feed machine gun primers or something? who knows. I think I'm going to try a batch of my precious remaining federal gmm210's from my reserve stash (from 2018 $39.99/1000
) to see if that makes a big difference. Of course I just had to use what I could find.
For your Information:
Well after getting pretty far into development I've learned....
N560 is a little temp sensitive.
@84F 66.5g put my 195 berger @2880 from a 22" carbon Bartlein through a TBAC Ultra7.
@43F same load is getting 2830.
This was a long range sessions I'm not sure how that velocity change effected accuracy but I'm left wondering what the steel groups would look like if I had kept in that 2880 range. Bummer. BTW that steel above was in shifty 5-20mph wind so I was pretty much looking for verticle dispersion.
Seating depth on my rifle for these (berger 195 EOL hybrid hunter) was forgiving. .030-.060 jump was good.
With the Sierra 183smk it wanted to be right at .040. it really did not like less. .010-.030 opened up to over an inch groups.
My gun shot a little over 3000 with 180's, 183's, 184's, even the 195 got close (actually I don't see any velocity loss vs smaller pills which is a great surprise) but pressure seemed to be making things really testy over 3000. It would get erratic velocity and thrown shots. Some aggressive smears and loose primer pockets. So I backed up from the ragged edge of pressure to a happy place. Which in shooting multiple ladder test's with multiple bullets everything seemed to like the 2870-2900 velocity range so I went there.
Unfortunately I think N560 is less temp stable than I'd like.
I'm curious about N570. I know guys are having great luck with that. How is the Temp stability? I'm seeing N560 loose 1fps per degree drop from 85-40 degrees. Which is disappointing.
Second question is about primers. I just can't seem to get my velocity spreads acceptable even being very particular and double weighing every powder charge. I'm beginning to suspect the CCI O.E.M 250 Magnum rifle primers I got in a plain white box labeled "not for resale" are not very good. Maybe they're belt feed machine gun primers or something? who knows. I think I'm going to try a batch of my precious remaining federal gmm210's from my reserve stash (from 2018 $39.99/1000
) to see if that makes a big difference. Of course I just had to use what I could find.For your Information:
Well after getting pretty far into development I've learned....
N560 is a little temp sensitive.
@84F 66.5g put my 195 berger @2880 from a 22" carbon Bartlein through a TBAC Ultra7.
@43F same load is getting 2830.
This was a long range sessions I'm not sure how that velocity change effected accuracy but I'm left wondering what the steel groups would look like if I had kept in that 2880 range. Bummer. BTW that steel above was in shifty 5-20mph wind so I was pretty much looking for verticle dispersion. Seating depth on my rifle for these (berger 195 EOL hybrid hunter) was forgiving. .030-.060 jump was good.
With the Sierra 183smk it wanted to be right at .040. it really did not like less. .010-.030 opened up to over an inch groups.
My gun shot a little over 3000 with 180's, 183's, 184's, even the 195 got close (actually I don't see any velocity loss vs smaller pills which is a great surprise) but pressure seemed to be making things really testy over 3000. It would get erratic velocity and thrown shots. Some aggressive smears and loose primer pockets. So I backed up from the ragged edge of pressure to a happy place. Which in shooting multiple ladder test's with multiple bullets everything seemed to like the 2870-2900 velocity range so I went there.
Unfortunately I think N560 is less temp stable than I'd like.
Looking at getting a 7prc and loading for it. What is outside nk diam of loaded rds with adg and Peterson? Trying to nail down bushing size. Thanks
usually you just have to buy several to get it right. I'm in the same boat
Yes, as they don't normally size exactly to number on bushing. Just wanted ballpark, like "I use .xxx with adg."
Range report: factory savage with 20” Proof
67 grains H1000 with 180 ELD-M gets 2650 fps. Not a hint of pressure
Was a little surprised. Maybe H1000 is a tad too slow. Can probably work up to 69. N
Accuracy was good. Recoil not as bad as anticipated with an 8# rifle and TBAC 7 ultra can
67 grains H1000 with 180 ELD-M gets 2650 fps. Not a hint of pressure
Was a little surprised. Maybe H1000 is a tad too slow. Can probably work up to 69. N
Accuracy was good. Recoil not as bad as anticipated with an 8# rifle and TBAC 7 ultra can
Adg new brass with 180 eldm has neck diameter of 0.314 loaded; and 0.3105 fresh out the box
Retumbo and N565 look great
. I've got a retumbo load I like but n565 looks like a it could be a tack driver22” barrel. I may try N570 after I test primers. Thanks
I tested 3 different primers. Winchester LRM, cci250, and federal GMM210. Results were very similar. I also did 5 rounds at a higher powder charge to try to move back up into my velocity node (2870-2900). This did make a big difference. In the summer at 85F 66.5g of N560 put me around 2885 and decent sd’s. Now at 45F same load has dropped to 2830 average. So by upping my charge to 67.2g I got back to 2890 and that 5shot string was sd6 ES16 
. Accuracy at 100 was equal. I may try N570 after deer season. For now this will get it done. 
. Accuracy at 100 was equal. I may try N570 after deer season. For now this will get it done.
Why not just swith to N565 and run the same velocity year round due it's temp stability?I tested 3 different primers. Winchester LRM, cci250, and federal GMM210. Results were very similar. I also did 5 rounds at a higher powder charge to try to move back up into my velocity node (2870-2900). This did make a big difference. In the summer at 85F 66.5g of N560 put me around 2885 and decent sd’s. Now at 45F same load has dropped to 2830 average. So by upping my charge to 67.2g I got back to 2890 and that 5shot string was sd6 ES16
What’s your source for N565 being more temp stable? I’d like to know that before I buy more powder.
That’s a possibility. I like that the N570 is bigger and will be closer to filling the case. I think generally a fuller case yields more consistent ignition and lower velocity spreads. According to vitiviouri, N570 will be a compressed load at 66.8g
But yes seeing how I’m 3 grains over their max N560 load, N565 may be the ticket. I don’t have either but I know N570 is available locally.
Thanks for the input guys
N565 is like a bulky H1000. Perfect powder for prc cases. Friend of mine is running 66gr of 565 in his 7prc with 180hyb at 2820, low psi load from his 24in barrel. Pressure is typically found 25-50fps above where H1000 shows. I've ran N565 in 300 prc and 65 prc with very good results. I have a 7/300 prc and 7lrm which both hold more powder than the 7prc, and N570 works in those.
I've found 565 and 570 to be very temp stable. Loads developed in 70ish degrees, shoot within 10-20 fps of known velocity when temps drop to the 30s and 40s in hunting season. N555 is very stable as well. I found N150,160,550 and 560 to vary a lot with large temp changes.
So far in my 26" 7prc, 183smk like 70gr h1000 in adg brass@2997fps
i forgot to hit ok on placement screen and lost 1 rd to that error.
Also 184 berger f open show some promise.
Also 184 berger f open show some promise.
^Fuc& yeah! The prospect of Lapua brass is a big part of the reason I chose PRC over 7RM. And I just picked her up from ES-tactical last night! 8# as pictured sans mag and muzzle device/can
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By the way guys, these are the magazines that you want for your 7 mm PRC if your chassis accepts them. The XLR chassis and the MDT chassis both take these MDT magazines, which are specifically marked 7PRC. They feed flawlessly and smoothly, they weigh next to nothing, and they’re only $49 each. They also do not rattle in the chassis.
On the other hand, the metal ones on the XLR website are heavy as shit, cost $80 each, are not designed specifically for 7PRC and are frankly way too long, and they rattle in the chassis. And of course you have to trudge through their giant chart to figure out which one you actually need and there are two different ones lol
Do yourself a favor and just get the MDT magazines that are marked 7PRC
On the other hand, the metal ones on the XLR website are heavy as shit, cost $80 each, are not designed specifically for 7PRC and are frankly way too long, and they rattle in the chassis. And of course you have to trudge through their giant chart to figure out which one you actually need and there are two different ones lol
Do yourself a favor and just get the MDT magazines that are marked 7PRC
They are just catching up. I use an Oryx chassis for 7 PRC and at the time, they did not have this type of mag that I could see. So, I had to get the 5 rd metal mag for .300 WM and the 7 PRC is a smidge shorter than that.
I agree with this IF that person doesn't have mags for their PRC yet. I bought 2 of those MDT mags to compliment my existing Accurate RUM/PRC 3.850 mags and had to remove material off the MDT's so they can latch properly.
-When the Accurate latches, the MDT's wouldn't latch.
-Adjusted the mag latch down on the XLR chassis so all mags latch but started having feeding issues with the Accurates.
-Went back to original latch position and removed material off the top of the MDT's. No problems.
Long action
I suppose you could do the 30 Ott six size action and I debated that, but this defiance machine anti-X action was $2000 and I wanted to have lots of versatility for other cartridges in the event I build it out to something else in the future
Plus, those medium actions Keep changing up and I just was not comfortable, jumping on the latest bandwagon
I suppose you could do the 30 Ott six size action and I debated that, but this defiance machine anti-X action was $2000 and I wanted to have lots of versatility for other cartridges in the event I build it out to something else in the future
Plus, those medium actions Keep changing up and I just was not comfortable, jumping on the latest bandwagon
By the way, those rounds are loaded to 3.320 inches.
My gunsmith used a Manson reamer, the standard one they have off the shelf with a slightly different base diameter, and he did not add any additional free bore. My COAL for a 180ELD – M touching the lands is 3.330“.
Just an FYI, for anybody considering getting one of these spun up. That COAL puts the top of the boat tail right at the bottom of the neck for that bullet. I wouldn’t see a point of extending the free bore unless you were shooting a solid or a 190 class bullet that is longer.
My gunsmith used a Manson reamer, the standard one they have off the shelf with a slightly different base diameter, and he did not add any additional free bore. My COAL for a 180ELD – M touching the lands is 3.330“.
Just an FYI, for anybody considering getting one of these spun up. That COAL puts the top of the boat tail right at the bottom of the neck for that bullet. I wouldn’t see a point of extending the free bore unless you were shooting a solid or a 190 class bullet that is longer.
