28 nosler preformance with saami spec chamber

[FURMAN]

Was 82.5-83 where you could feel it in the bolt lift? I was seeing shiny ejector marks at 84g of n570.

Yes. The brass is very soft and had ejector marks before that.

 

[Deleted member 25294]

rfurman have you done much shooting with your 28 nosler in the ridgeline? I was wondering if you are still running the same load and how it is performing for you. Also wondering if you have any data on the 180 eldm's as far as BC numbers or terminal performance?

I'm shooting the 180 eldm's @3100 with retumbo and its not a hot load.
I've tested the bc of.796 out to 1300 yards and its dead on at all ranges.
Very impressed with these bullets so far, I ditched the 195's

 

[BClrh]

I'm shooting the 180 eldm's @3100 with retumbo and its not a hot load.
I've tested the bc of.796 out to 1300 yards and its dead on at all ranges.
Very impressed with these bullets so far, I ditched the 195's

Good to hear what twist are you running

 

[scdogman]

3090 FPS XX grains of h1000 180 eld-m


3012 FPS XX.x grains of Retumbo 195 eol

Saami chamber

I've shoot both to 1100 yards.

 

[Deleted member 25294]

Good to hear what twist are you running

8 twist 26" barrel 700 "Remage"
My load is 80 grains Retumbo, FED215M, 3.65 OAL.
I think this is the perfect balance for a long range heavy hitter that's light enough for packing.
My rifle weighs 8.4 lbs scoped, it has a brake and recoil is pretty mild.

 

[BClrh]

3090 FPS XX grains of h1000 180 eld-m


3012 FPS XX.x grains of Retumbo 195 eol

Saami chamber

I've shoot both to 1100 yards.

What is you coal to touching the lands with the 180's? You accidentally put x's for your powder charges

 

[scdogman]

I'm at 2.84 base to ogive. That puts me at .030 from the lands. My load for the 180 is 79 grains of h1000. Although this is not a hot load for my rifle, please work up carefully. Every rifle is different.

 

[BClrh]

Great info, thanks guys. I think I will give h1000 a try. You give up some speed with it, but its just so hard to beat for stability and year round consistency. The n570 can go back on the shelf.

 

[Kmccord]

Are you guys not having any luck with N570 powder? I have good luck with 195 in mine using RL33, I first tried using H1000, but had pressure signs using this powder and could only get a little over 2900 FPS. I switched to RL33 and was able to hit 3049fps and accuracy improved, but would like to get to using a temp stable powder again. I have heard N570 was as good as RL33 with temp stability, but never heard anyone not having any luck using 570. I hate to spend the money on that powder if guys using it are having problems.

 

[BClrh]

Are you guys not having any luck with N570 powder? I have good luck with 195 in mine using RL33, I first tried using H1000, but had pressure signs using this powder and could only get a little over 2900 FPS. I switched to RL33 and was able to hit 3049fps and accuracy improved, but would like to get to using a temp stable powder again. I have heard N570 was as good as RL33 with temp stability, but never heard anyone not having any luck using 570. I hate to spend the money on that powder if guys using it are having problems.

For me it didn't work as I posted on the last page but every rifle is different and the 195 could work better with n570 as well.
I would also be interested in hearing if anyone is having luck with n570.

 

[BClrh]

I did a pressure test today with the my ridgeline 28 nosler, 180 eldm and H1000. I have a coal of 3.608 and that is jamming 0.002. I recorded velocity with a magneto speed.
75 -2993
76 -3021
77 -3036
77.5-3092
78 -3087
78.5-3110
79 -3133
79.5-3128
80 -3124

Interesting at 77.5 to 78 there was a drop in velocity and then from 79 to 80 it dropped as well. I am guessing that 79-80 was getting to max pressure and leveling out. Any thoughts, would the nodes most likely be at 77.5-78 and 79-80

 

[FURMAN]

I did a pressure test today with the my ridgeline 28 nosler, 180 eldm and H1000. I have a coal of 3.608 and that is jamming 0.002. I recorded velocity with a magneto speed.
75 -2993
76 -3021
77 -3036
77.5-3092
78 -3087
78.5-3110
79 -3133
79.5-3128
80 -3124

Interesting at 77.5 to 78 there was a drop in velocity and then from 79 to 80 it dropped as well. I am guessing that 79-80 was getting to max pressure and leveling out. Any thoughts, would the nodes most likely be at 77.5-78 and 79-80

That looks almost identical to my data.

 

[257Tony]

I did a pressure test today with the my ridgeline 28 nosler, 180 eldm and H1000. I have a coal of 3.608 and that is jamming 0.002. I recorded velocity with a magneto speed.
75 -2993
76 -3021
77 -3036
77.5-3092
78 -3087
78.5-3110
79 -3133
79.5-3128
80 -3124

Interesting at 77.5 to 78 there was a drop in velocity and then from 79 to 80 it dropped as well. I am guessing that 79-80 was getting to max pressure and leveling out. Any thoughts, would the nodes most likely be at 77.5-78 and 79-80

79 looks like a good load, I believe that is also the listed max in Noslers load data for the 175 ABLR. I'd start your depth testing with that one.

 

[FURMAN]

Based on those velocity number 79.5 will be the load. 79.0 is too close to the change. The Nosler load data is for an oal of 3.34 so it's not really valid in this case.