RL25 & 280AI

[Seedsntrees]

Hello,

I can not find any RL22 that I usually load, but found some RL25.

Question: Has anyone used RL25 and the 150 Grain LR AccuBond for a load development, or is RL25 too slow for the 280AI?

I always had great success with RL22.

Thanks,

 

[DrMike]

Cartridge : .280 Ack Imp
Bullet : .284, 150, Nosler AccuBond LR 58734 G7
Useable Case Capaci: 65.284 grain H2O = 4.239 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-25

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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

-20.0 89 53.52 2480 2049 31253 10441 94.0 1.537
-18.0 92 54.86 2548 2162 33511 10763 95.3 1.494
-16.0 94 56.20 2616 2279 35932 11062 96.5 1.451
-14.0 96 57.53 2683 2398 38564 11336 97.5 1.406
-12.0 98 58.87 2751 2521 41394 11582 98.3 1.359
-10.0 101 60.21 2818 2646 44449 11798 99.0 1.314
-08.0 103 61.55 2886 2774 47754 11983 99.5 1.270
-06.0 105 62.89 2953 2904 51331 12133 99.8 1.228
-04.0 107 64.22 3019 3035 55210 12249 100.0 1.188
-02.0 110 65.56 3085 3169 59424 12335 100.0 1.149 ! Near Maximum !
+00.0 112 66.90 3150 3304 64005 12416 100.0 1.111 ! Near Maximum !
+02.0 114 68.24 3214 3441 68995 12491 100.0 1.075 !DANGEROUS LOAD-DO NOT USE!
+04.0 116 69.58 3278 3580 74442 12561 100.0 1.040 !DANGEROUS LOAD-DO NOT USE!
+06.0 118 70.91 3342 3720 80403 12625 100.0 1.006 !DANGEROUS LOAD-DO NOT USE!
+08.0 121 72.25 3406 3863 86938 12684 100.0 0.973 !DANGEROUS LOAD-DO NOT USE!
+10.0 123 73.59 3469 4008 94121 12736 100.0 0.941 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 112 66.90 3280 3584 79378 11894 100.0 1.023 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 112 66.90 2948 2894 51081 12772 97.8 1.227

 

[JD338]

I'm thinking that unless you have a long throat to seat the bullet way out there, you wont have enough case capacity to get the speeds up where you would like to have them.

JD338

 

[Ridgerunner665]

I'm thinking that unless you have a long throat to seat the bullet way out there, you wont have enough case capacity to get the speeds up where you would like to have them.

JD338

Yep...

25 is too slow for the Ackley, unless you have a rifle that can feed long loaded 195 grain bullets.

 

[Seedsntrees]

Yeah, I have the same concerns.

Well thanks for your comments, I will continue the hunt for RL22. If nothing else, I have some RL19 that I can load as a backup.

I know that RL22 works for sure.

Thanks again!

OUT!

 

[Ridgerunner665]

RL 26 works even better than RL 22.

Sent from my XT1080 using Tapatalk

 

[MAinAR]

Yeah, I have the same concerns.
Well thanks for your comments, I will continue the hunt for RL22. If nothing else, I have some RL19 that I can load as a backup.
I know that RL22 works for sure.
Thanks again!
OUT!

H4831SC is another for sure.

 

[NWBlacktail]

RL19 should work, I think it's close to IMR 4350 in terms of burn rate (which is listed, just glancing up at MAinAR's Nosler loads).

I bought an 8# keg of RL 26 for my 280 Ackley. I don't want to deal with supply chain disruptions. If RL22 is working for you, stock up! The next preseditnial elections are coming up and there will likely soon be some panic buying. :roll:

 

[JD338]

MRP would be another good one to look at.

JD338

 

[BF375]

Don't have a 280AI but have loaded a lot of RL25 in the 7 Rem Mag,and also the 270 Winchester. This was the max load listed for the 130 Barnes XLC and the Barnes manual max load. From a 22" barrel of a M70 Classic FW,the chronograph said right at 3200 fps.

A bit of interpolation should tell us that if RL25 works in the 7 Rem Mag,and in the 270 Winchester, it should work fine in the 280 AI,which is sort of in the middle of the other two.