Quickload Request - .277 Hornady 140 gr. Interlock BTSP

[NYDAN]

After looking for a year and half I finally found a box of .277 Hornady 140 gr. Interlock BTSP.

Would someone be so kind as to run a Quickload projection with the following criteria?

Cartridge - 270 Win.
Bullet - .277 Hornady 140 gr. Interlock BTSP
Powder - IMR4831
Barrel Length - 24"
Water Capacity - 71.3 gr.
OAL - 3.290"

Thank you.

 

[DrMike]

Cartridge : .270 Win. (SAAMI)
Bullet : .277, 140, Hornady BTSP 2735
Useable Case Capaci: 64.550 grain H2O = 4.191 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 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 81 46.00 2485 1919 33322 9604 96.5 1.523
-18.0 83 47.15 2543 2011 35535 9846 97.3 1.486
-16.0 85 48.30 2602 2104 37885 10072 98.0 1.444
-14.0 87 49.45 2659 2198 40380 10282 98.6 1.401
-12.0 89 50.60 2717 2294 43028 10476 99.1 1.359
-10.0 91 51.75 2774 2392 45839 10651 99.5 1.319
-08.0 93 52.90 2830 2490 48823 10807 99.8 1.281
-06.0 95 54.05 2886 2589 51991 10943 100.0 1.244
-04.0 97 55.20 2941 2690 55357 11060 100.0 1.208 ! Near Maximum !
-02.0 99 56.35 2996 2791 58934 11164 100.0 1.174 ! Near Maximum !
+00.0 101 57.50 3050 2892 62737 11266 100.0 1.141 ! Near Maximum !
+02.0 103 58.65 3104 2995 66783 11365 100.0 1.109 !DANGEROUS LOAD-DO NOT USE!
+04.0 105 59.80 3157 3098 71091 11461 100.0 1.079 !DANGEROUS LOAD-DO NOT USE!
+06.0 107 60.95 3209 3202 75680 11553 100.0 1.049 !DANGEROUS LOAD-DO NOT USE!
+08.0 109 62.10 3262 3307 80574 11642 100.0 1.021 !DANGEROUS LOAD-DO NOT USE!
+10.0 111 63.25 3314 3414 85797 11727 100.0 0.994 !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 101 57.50 3152 3088 74514 10872 100.0 1.061 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 101 57.50 2896 2607 51015 11606 98.6 1.249

Cartridge : .270 Win. (SAAMI)
Bullet : .277, 140, Hornady BTSP 2735
Useable Case Capaci: 64.550 grain H2O = 4.191 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length : 24.0 inch = 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 64000 psi, or 441 MPa
or a maximum loading ratio or filling of 110 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

11 loads produced a Loading Ratio below user-defined minimum of 90%. These powders have been skipped.
Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
Norma MRP 102.9 63.9 4.14 3191 99.9 64000 13281 1.111 ! Near Maximum !
Vihtavuori N560 104.7 63.7 4.12 3185 98.2 64000 13601 1.106 ! Near Maximum !
Accurate MAGPRO 104.9 66.4 4.30 3172 96.9 64000 13653 1.113 ! Near Maximum !
IMR 7828 109.2 63.1 4.09 3172 98.5 64000 13165 1.097 ! Near Maximum !
IMR 7828 SSC 103.3 63.1 4.09 3172 98.5 64000 13165 1.097 ! Near Maximum !
Alliant Reloder-25 110.0 65.1 4.22 3162 100.0 61800 12723 1.118 ! Near Maximum !
Alliant Reloder-22 105.0 63.1 4.09 3160 99.3 64000 13086 1.112 ! Near Maximum !
Winchester WXR 107.8 63.4 4.11 3159 99.3 64000 13100 1.112 ! Near Maximum !
Ramshot Magnum 104.5 67.8 4.39 3139 99.7 64000 12481 1.105 ! Near Maximum !
Alliant Reloder-17 92.4 57.7 3.74 3130 100.0 64000 11732 1.112 ! Near Maximum !
Alliant Reloder-19 101.7 60.5 3.92 3116 99.2 64000 12475 1.109 ! Near Maximum !
Ramshot Hunter 97.2 59.7 3.87 3109 100.0 64000 12063 1.116 ! Near Maximum !
Winchester 760 91.9 57.8 3.75 3108 99.9 64000 12124 1.117 ! Near Maximum !
Hodgdon H414 91.9 57.8 3.75 3108 99.9 64000 12124 1.117 ! Near Maximum !
Hodgdon H4831 SC 102.9 61.9 4.01 3089 97.8 64000 12288 1.107 ! Near Maximum !
Hodgdon H4831 107.0 61.9 4.01 3089 97.8 64000 12288 1.107 ! Near Maximum !
Vihtavuori N550 94.1 57.2 3.71 3087 100.0 64000 11691 1.126 ! Near Maximum !
Norma URP 96.8 57.0 3.69 3087 100.0 64000 11550 1.122 ! Near Maximum !
Norma MRP 2 110.0 65.5 4.24 3083 98.0 56747 13342 1.173 ! Near Maximum !
Accurate 4350 95.9 57.1 3.70 3081 100.0 64000 11510 1.139 ! Near Maximum !
IMR 4831 101.5 57.9 3.75 3067 100.0 64000 11298 1.131 ! Near Maximum !
Winchester Supreme 780 100.2 62.9 4.07 3065 99.1 64000 11833 1.115 ! Near Maximum !
Accurate 3100 105.0 62.5 4.05 3062 100.0 64000 11556 1.142 ! Near Maximum !
Vihtavuori N165 107.2 63.1 4.09 3060 99.5 64000 11629 1.119 ! Near Maximum !
Alliant Reloder-33 110.0 71.9 4.66 3059 92.9 54466 14059 1.186
Vihtavuori N160 107.2 61.2 3.96 3043 98.3 64000 11639 1.114 ! Near Maximum !
Hodgdon Hybrid 100V 99.3 57.2 3.71 3042 100.0 64000 10653 1.123 ! Near Maximum !
IMR 4007 SSC 91.5 55.2 3.58 3033 99.6 64000 11346 1.122 ! Near Maximum !
Hodgdon H1000 110.0 64.7 4.20 3024 97.4 56447 12503 1.159 ! Near Maximum !

 

[NYDAN]

Dr. Mike, thank you for such a quick response!

Dan

 

[DrMike]

You are most welcome, Dan. Glad I could help.

 

[SJB358]

Dan, are you changing up from the 150 BTs?

Those 140's look quite speedy with the slow burners.

 

[NYDAN]

Scotty, no the 150 gr. CTBST will probably be my bullet of choice for hunting whitetails here on my property. The 150 gr. CTBST at a muzzle velocity of 2900 fps will deliver energy out to 400 yards for that one chance I may have at a big buck in the field behind the house. I just received the bullets I ordered 11 months ago. My load development is probably 80% complete. I still have some seating depth work to do and I want to compare the CTBST to BT's. The one time I did a direct substitution I had higher velocity and pressure signs on the first BT fired with my load for the CTBST. I have to figure out why.

I just have an interest in the Hornady 140 gr. interlock BTSP. My 7mm-08 really liked the old "light magnum" (predecessor to the Superformance) factory loads with the 7mm 140 gr. interlock BTSP. I was also impressed with the terminal performace on the deer I shot with those bullets. So, I thought I would try them out in the 270 Win. I like the fact that the Hornady 140 gr. Interlock BTSP has a higher B.C. than the 140 NBT. With the velocities possilbe for these bullets I would like to check on the terminal performance.

Meanwhile I am 85% complete with the load development for 140 gr. AB's. I have a good load using IMR7828 except that the velocity variation is more than I like. I need to confirm a load using IMR 4831 that shows less variation.

I haven't shot a bad group with the 140 gr. BT's. Any powder I use works with those bullets.

Additionally, some 150 gr. Partitions arrive in the mail one day. I want to work up a load with those just in case Rol_P drags me out west with him.

You know there are so many bullets and so many powders to try in just one rifle that I just can't keep up. How do you guys with multiple rifles cope with all the combinations to try?

 

[SJB358]

I'm with you Dan. I love to shoot new bullets and with a solid 270 like yours any of those you mentioned are excellent choices.

I do like the 150 BT. Great bullet for just about anything you'd wanna tackle with a 270. The PT is just a little better yet for elk.

 

[kraky]

I have a 270 that likes accubonds AND interlocks.....but in my buddies rifle it rejected the a b's and bt's and doted on interlocks. Funny how that works sometimes. They're all great performers on deer.
Re the ctbt's and pressure I swear in some guns the coated bullets act slipperier and are slower than regular bts.

 

[drakehammer]

Hello Dr. Mike,
Humbly reviving this old QL request. I am glad I found this data, however I am specifically looking for Shooters World SW4350, a.k.a. Lovex S070, used with the Interlock 140gr BTSP. Would you be willing run that on Quickload for me?

I have found the QL data for 140 NBTs and 140 NABs on other threads, however there are some definite differences from the 140 Interlock data sets.

Thank you


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[DrMike]

Cartridge          : .270 Win. (SAAMI)
Bullet             : .277, 140, Hornady BTSP 2735
Useable Case Capaci: 61.009 grain H2O = 3.961 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Shooters World SW4350

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0   89    49.32   2681    2235   47187  11386     97.0    1.235
-09.0   90    49.87   2710    2283   48672  11506     97.4    1.216
-08.0   91    50.42   2738    2331   50202  11622     97.7    1.198
-07.0   92    50.96   2767    2380   51779  11735     98.0    1.181
-06.0   93    51.51   2795    2429   53403  11843     98.3    1.163
-05.0   94    52.06   2824    2478   55077  11948     98.5    1.146
-04.0   95    52.61   2852    2528   56802  12048     98.8    1.130  ! Near Maximum !
-03.0   96    53.16   2880    2578   58581  12145     99.0    1.114  ! Near Maximum !
-02.0   97    53.70   2908    2629   60414  12237     99.2    1.098  ! Near Maximum !
-01.0   98    54.25   2936    2680   62305  12324     99.4    1.082  ! Near Maximum !
+00.0   99    54.80   2964    2731   64254  12407     99.5    1.066  ! Near Maximum !
+01.0  100    55.35   2992    2783   66265  12485     99.7    1.051  !DANGEROUS LOAD-DO NOT USE!
+02.0  100    55.90   3020    2835   68340  12559     99.8    1.036  !DANGEROUS LOAD-DO NOT USE!
+03.0  101    56.44   3047    2887   70481  12628     99.9    1.022  !DANGEROUS LOAD-DO NOT USE!
+04.0  102    56.99   3075    2939   72691  12691     99.9    1.008  !DANGEROUS LOAD-DO NOT USE!
+05.0  103    57.54   3102    2992   74973  12750    100.0    0.993  !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     99    54.80   3078    2946   75349  12023    100.0    0.993  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     99    54.80   2803    2442   53236  12287     95.5    1.164

 

[drakehammer]

Thank you


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