26 Nosler Wildcats - 28 Nosler (284)

[sheepaholic]

Bullet length 1.577
Boat tail length .204
Boat tail diameter .243

 

[sheepaholic]

Doyou think I'll gain much more speed going to a 26" barrel?

 

[Deleted member 46119]

Attempting to formulate a reply that does not leave me with a liability or violate my QuickLoad license.

When I did my load development there was no data. Now there is at least comparative data even if it's not the same bullet.

H1000 is what I used with the 175 Sierra.
I started at 78 grains of H1000 for a %91 fill ratio. I did not go over 84 grains.
With a 24" barrel and a load that would produce ~54k psi, I got 3000fps. I feel I should have gotten more as my pressures were low.
A 26" barrel will gain ~50fps

Your COAL at max -.020 would be 3.573 which should feed great in your current setup. I don't know how much jump the ELD-X wants.

Hogdgon's site has a much lower starting point of 72.8 for Partitions at book length of 3.34. This seems to be an %86 fill ratio. Perhaps very conservative but it was tested in the lab so with new brass it's is most likely %90.

What I do is figure out the %90 fill and go with that as a starting point.

 

[sheepaholic]

Thanks a lot
I took the nose data and started low and am going to to a coal test at a lower charge for both h1000 and retumbo then find the max for both at whatever coal works the best
Do you think I would be better off going to a 26" barrel when I do rebarrel it or is a 24 going to be enough

 

[Deleted member 46119]

Thanks a lot
I took the nose data and started low and am going to to a coal test at a lower charge for both h1000 and retumbo then find the max for both at whatever coal works the best
Do you think I would be better off going to a 26" barrel when I do rebarrel it or is a 24 going to be enough

26" maybe more

 

[BoatTail]

I recommend you not go with H1000. You will not get the velocities you will with Retumbo or RL33 and to do so will put your loads at too high a pressure.

I built my first 28 Nosler shortly have Fred did his, before any published data was available. Nosler's Reloading Guide #8 now show the following max loads and velocities:

H1000 79grs 3103
Retumbo 82grs 3166
RL33 88grs 3211

Using QuickLoad (a newly acquired tool) the max load is:

H1000 80.5grs 3031

Before knowing this I did extensive testing in my first 28 Nosler with 175 gr ABLR's and obtained the data in the file below with a 25.5" Hart #3 barrel with a 1 in 9 twist:

NOTE: Everything past 79grs in this data is over pressure and should not be used. Standard reloading practices say that with a magnum cartridge, you have reach your maximum load when you have reached a case increase (measured where the belt would be with the 28 Nosler) of 0.0006 to 0.0007". I did not know that at the time and since I did not have a sticky bolt (new chamber) or see significantly flattened primers I kept going past 79 grains. I did see plunger marks and extractor marks starting at 80grs to the last but discounted that because I heard Nosler brass was soft.

While I did see the best group with 83gs of H1000 it was way over pressure.

Both Retumbo and RL33 provide better velocities with lower pressures and for me showed similar accuracy. I will share my Retumbo and RL33 load data tomorrow.

Bruce

 

[sheepaholic]

Thanks Bruce

 

[BoatTail]

Sheepaholic,

One other bit of info. Back in Dec 2013 I spoke to one of the Nosler reps and received early information on the 175 ABLR loads that are now published in Nosler's #8 manual. I asked him about the H1000, and I said that the Max load and the velocity seemed low. He said that when they tested the H1000, and went up to 80 grs, the pressures rose to 67,000 psi so 79 was the max there.

Hope that helps.

Bruce

 

[Deleted member 46119]

Thanks Bruce

I agree with bspooley. H1000 is not the best powder. Being an engineer type person I answered the question. No releived of that constraint.

Reloader 33, Retumbo, IMR7828 (The more I use it the more I like it).

Cartridge : 284/26 Nosler
Bullet : .284, 175, Hornady LD-X 2841
Useable Case Capaci: 93.595 grain H2O = 6.077 cm³
Cartridge O.A.L. L6: 3.573 inch = 90.75 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-33

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.111% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-06.7 90 84.00 2830 2882 40702 16582 92.0 1.469
-05.6 91 85.00 2871 2966 42322 16854 92.8 1.441
-04.4 92 86.00 2913 3052 44015 17120 93.5 1.413
-03.3 93 87.00 2954 3139 45783 17378 94.2 1.386
-02.2 94 88.00 2996 3228 47625 17628 94.8 1.360
-01.1 95 89.00 3037 3318 49536 17869 95.5 1.335
+00.0 96 90.00 3079 3410 51519 18101 96.1 1.310
+01.1 97 91.00 3121 3504 53583 18323 96.6 1.285
+02.2 98 92.00 3163 3599 55734 18535 97.1 1.261 ! Near Maximum !
+03.3 99 93.00 3205 3695 57977 18736 97.6 1.237 ! Near Maximum !
+04.4 100 94.00 3247 3793 60315 18926 98.0 1.214 ! Near Maximum !

 

[sheepaholic]

Looks like I may have to find some RL33 thanks for the info guys
Guess I will start with retumbo and go from there

 

[Deleted member 46119]

Looks like I may have to find some RL33 thanks for the info guys
Guess I will start with retumbo and go from there

175 GR. NOS PART
Starting Loads Maximum Loads
Manufacturer Powder Bullet Diam. C.O.L. Grs. Vel. (ft/s)Pressure Grs. Vel. (ft/s) Pressure
Hodgdon Retumbo .284" 3.340" 72.3 2,858 56,000 PSI 78.0 3,018 64,000 PSI

Cartridge : 284/26 Nosler
Bullet : .284, 175, Hornady LD-X 2841
Useable Case Capaci: 93.595 grain H2O = 6.077 cm³
Cartridge O.A.L. L6: 3.573 inch = 90.75 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon Retumbo

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.163% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-11.6 88 76.00 2743 2707 36975 15182 98.4 1.524
-10.5 89 77.00 2782 2785 38417 15378 98.8 1.494
-09.3 90 78.00 2821 2863 39920 15560 99.2 1.466
-08.1 91 79.00 2860 2943 41484 15729 99.4 1.438
-07.0 92 80.00 2899 3024 43112 15883 99.7 1.412
-05.8 93 81.00 2938 3105 44801 16023 99.9 1.385
-04.7 95 82.00 2977 3187 46575 16149 100.0 1.360
-03.5 96 83.00 3015 3270 48418 16258 100.0 1.334
-02.3 97 84.00 3053 3353 50337 16358 100.0 1.310
-01.2 98 85.00 3091 3437 52340 16455 100.0 1.286
+00.0 99 86.00 3129 3521 54427 16551 100.0 1.262
+01.2 100 87.00 3166 3606 56608 16646 100.0 1.239 ! Near Maximum !
+02.3 101 88.00 3203 3691 58883 16739 100.0 1.216 ! Near Maximum !
+03.5 103 89.00 3240 3777 61259 16830 100.0 1.194 ! Near Maximum !

 

[sheepaholic]

Wow retumbo looks like it should work great if I can get close to 3200 out of a 24" barrel it would he awesome
It would make a great sporter weight carry everywhere rifle

 

[Deleted member 46119]

Wow retumbo looks like it should work great if I can get close to 3200 out of a 24" barrel it would he awesome
It would make a great sporter weight carry everywhere rifle

Please tell me the actual COAL you plan to use so I can sanity check it against published loads and what QucikLoad says for the longer COAL.

 

[sheepaholic]

Hahaha I'm going to do a coal test to see what they like for seating depths but I'm hoping to stick to .020 to .050 from the lands which is 3.593 so probably 3.873 to 3.543