IMR7828 .270 win

[Papa2817]

Hope I'm on the right forum because this
is my first time around the block on the site.
My question is has anyone had experience with IMR 7828, with 150 sst in .270 win? Right now I don't care about 4350, 4831,or anything but the .270 win.
Would appreciate what you guys/girls have to say.

papa2817

 

[Poper]

I tried IMR7828 in my .270 with 140 gr. Bergers. Results were good but not spectacular. I think 7828 is probably a little slow for the .270 Win. and is better suited to Rem. 7mm mag. and larger cases. JMHO, of course.

I have much better results using IMR4831 in the .270. Like 2-3/4" 5-round groups at 500 meters.

 

[Papa2817]

popper, thanks for your input. I have had some nice group s with IMR4831, it's my go to for the .270.
But I got #8 7828, never opened for $25. at an estate sale. Couldn't walk away from it.

 

[JimKirk]

IMR 7828 will offer a few fps more velocity over H4831 ... although it also take several grains more of it to do so ... it will also do at a slightly lower pressure ... With a 150 grain bullet ...

Check out the data at http://www.hodgdonreloading.com/data/rifle

 

[Dudedog]

No input on 7828,

But Welcome to THR! Papa2817,
Lots of great people here.

 

[old heeler]

I'm using IMR-7828ssc in a 270 with 150gr ABLR and load is from Nosler manual, they used IMR-7828. I haven't use that powder with other 270 bullets.

 

[LoonWulf]

Id guess youll see excessive compression before pressure signs. Ill run some quick loads numbers later this morning if you want to give me your coal.

 

[GooseGestapo]

I've used it in one of my .270's, a 24" Zastava/Interarms MkX.
I got claimed velocities but lackluster accuracy. Same with 4831's.For my rifle, it's IMR4350, H4350, and RL22. Not as fast, but much more accurate.
I was using some older flat base 150gr Hornady bullets. A different bullet might have given better accuracy.
I did see best accuracy at higher loadings.
I was using Federal 215's. A different primer might have helped too.

 

[old heeler]

Id guess youll see excessive compression before pressure signs. Ill run some quick loads numbers later this morning if you want to give me your coal.

I already got QL on Nolser site.

 

[Papa2817]

Thanks Loon Wulf.
COAL with IMR 4350 and 4831, has been 3.315. with hornady 150, SST. I have not loaded any 7828 yet, hopefully this weekend.

 

[JimKirk]

No compression indicated at the max load of 56.8 grains...

IMR 7828 work well with reasonable compression....

 

[LoonWulf]

Cartridge : .270 Win. (SAAMI)
Bullet : .277, 150, Hornady SST InterLock 27402
Useable Case Capaci: 58.234 grain H2O = 3.781 cm³
Cartridge O.A.L. L6: 3.315 inch = 84.20 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : IMR 4350

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 80 42.71 2389 1901 35396 8753 93.5 1.504
-18.0 82 43.78 2445 1990 37684 8999 94.5 1.464
-16.0 84 44.85 2500 2082 40111 9236 95.4 1.421
-14.0 86 45.92 2555 2175 42688 9462 96.2 1.380
-12.0 88 46.98 2610 2269 45422 9677 97.0 1.340
-10.0 90 48.05 2665 2366 48325 9881 97.6 1.302
-08.0 92 49.12 2720 2464 51407 10071 98.2 1.265
-06.0 94 50.19 2774 2563 54682 10248 98.7 1.230
-04.0 96 51.25 2828 2664 58162 10410 99.1 1.196 ! Near Maximum !
-02.0 98 52.32 2882 2766 61862 10558 99.5 1.163 ! Near Maximum !
+00.0 100 53.39 2935 2869 65800 10689 99.7 1.132 !DANGEROUS LOAD-DO NOT USE!
+02.0 102 54.46 2988 2974 69994 10804 99.9 1.101 !DANGEROUS LOAD-DO NOT USE!
+04.0 104 55.53 3041 3080 74464 10902 100.0 1.072 !DANGEROUS LOAD-DO NOT USE!
+06.0 106 56.59 3093 3186 79233 10985 100.0 1.043 !DANGEROUS LOAD-DO NOT USE!
+08.0 108 57.66 3145 3294 84326 11062 100.0 1.016 !DANGEROUS LOAD-DO NOT USE!
+10.0 110 58.73 3196 3403 89772 11136 100.0 0.989 !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 100 53.39 3038 3073 76917 10318 100.0 1.060 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 53.39 2788 2588 54805 10673 96.2 1.226

 

[LoonWulf]

Cartridge : .270 Win. (SAAMI)
Bullet : .277, 150, Hornady SST InterLock 27402
Useable Case Capaci: 58.234 grain H2O = 3.781 cm³
Cartridge O.A.L. L6: 3.315 inch = 84.20 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : IMR 4831

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 83 42.71 2396 1912 33987 9009 96.9 1.550
-18.0 85 43.78 2452 2003 36281 9228 97.7 1.509
-16.0 87 44.85 2508 2095 38722 9432 98.3 1.464
-14.0 89 45.92 2564 2189 41319 9621 98.9 1.419
-12.0 91 46.98 2619 2285 44080 9793 99.3 1.377
-10.0 93 48.05 2674 2382 47018 9948 99.7 1.336
-08.0 96 49.12 2728 2480 50145 10085 99.9 1.296
-06.0 98 50.19 2782 2578 53473 10202 100.0 1.259
-04.0 100 51.25 2836 2678 57018 10303 100.0 1.222 ! Near Maximum !
-02.0 102 52.32 2888 2779 60795 10398 100.0 1.187 ! Near Maximum !
+00.0 104 53.39 2941 2880 64823 10490 100.0 1.154 !DANGEROUS LOAD-DO NOT USE!
+02.0 106 54.46 2992 2982 69122 10579 100.0 1.121 !DANGEROUS LOAD-DO NOT USE!
+04.0 108 55.53 3044 3086 73713 10664 100.0 1.090 !DANGEROUS LOAD-DO NOT USE!
+06.0 110 56.59 3095 3190 78622 10746 100.0 1.060 !DANGEROUS LOAD-DO NOT USE!
+08.0 112 57.66 3145 3295 83876 10825 100.0 1.031 !DANGEROUS LOAD-DO NOT USE!
+10.0 114 58.73 3196 3402 89507 10900 100.0 1.003 !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 104 53.39 3035 3069 77253 10107 100.0 1.074 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 104 53.39 2795 2603 52502 10862 98.8 1.262

 

[LoonWulf]

Cartridge : .270 Win. (SAAMI)
Bullet : .277, 150, Hornady SST InterLock 27402
Useable Case Capaci: 58.234 grain H2O = 3.781 cm³
Cartridge O.A.L. L6: 3.315 inch = 84.20 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : IMR 7828

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 82 42.71 2170 1568 25396 8364 81.6 1.696
-18.0 84 43.78 2227 1652 27040 8696 83.2 1.653
-16.0 86 44.85 2285 1739 28796 9024 84.8 1.611
-14.0 88 45.92 2343 1829 30672 9347 86.3 1.569
-12.0 90 46.98 2402 1922 32676 9663 87.8 1.529
-10.0 92 48.05 2462 2018 34817 9972 89.2 1.489
-08.0 94 49.12 2522 2118 37110 10271 90.5 1.450
-06.0 96 50.19 2582 2220 39562 10559 91.8 1.406
-04.0 98 51.25 2642 2325 42191 10835 93.0 1.364
-02.0 100 52.32 2703 2434 45012 11098 94.1 1.323
+00.0 102 53.39 2764 2545 48036 11345 95.1 1.282
+02.0 104 54.46 2825 2659 51294 11577 96.0 1.244
+04.0 106 55.53 2887 2775 54797 11790 96.8 1.206
+06.0 108 56.59 2948 2895 58571 11985 97.6 1.170 ! Near Maximum !
+08.0 111 57.66 3009 3016 62644 12159 98.2 1.135 ! Near Maximum !
+10.0 113 58.73 3071 3141 67046 12312 98.8 1.101 !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 102 53.39 2931 2862 58230 11449 99.5 1.179 ! Near Maximum !
Data for burning rate decreased by 10% relative to nominal value:

 

[LoonWulf]

Again, this is running off of the information quickloads comes loaded with. These are at best rough guides to start from.

 

[LoonWulf]

according to QL the 7828 may not be a bad choice if your ok with some compression.

 

[Papa2817]

Thank you sir!
Never expected so much information.

 

[LoonWulf]

No problem, the more i play with QL the more i like it. One thing that helps with accuracy is knowing the actual water capacity of case, but usually it gives a good idea of where to start.

 

[JimKirk]

according to QL the 7828 may not be a bad choice if your ok with some compression.

Yeah QL got it right and seems to be a great in predictions .... It along with the amazing other software programs like ballistics apps are all useful tools in the shooting/reloading "sport"... I don't have QL ... but I do use the ballistic apps often .... Maybe one day I'll acquire it and give it a go ...

What I do have .... is a fair amount of actual real world experience using IMR 7828 in the .270 Winchester with 130, 140 &150 grain bullets ..... that was the reason I shared that it worked well in the .270 Win ...

It also works great in the .243 Win, .25/06, .264 WM, .270 WSM, 7 mm Rem, .300 WSM .... I am sure I have used it in others too ...
There are several newer powders that are in the 7828 burn rate area that would be useful in the .270 Win ... too many to recall all of them ... The older RL22 works too ...

Some folks treat compression like the black plague ... it is not ... but it works really well up to a reasonable point ... some of my most accurate loads are compressed loads ... and loads that are closer to 100% are often more accurate than those of a lower percentage loads ...

 

[LoonWulf]

QL is pretty close most of the time, but its really best as a starting point and reference. Real world experience helps a great deal.

Amusingly, the only really "OFF" prediction ive gotten with ql was using 7828 in my 6-284, but that i belive was caused by the stock case capacity being 3-4gr off. One of those things one needs to check when using the program, and something i missed that time.