an etip rifle

[baltz526]

if a person uses a 300win mag case as the base for a 180gr etip rifle. total over all length , to maximize powder capacity would need to be in the 3.70" area with a very deep throat, approx .420". then a barrel twist of around 1 in 8.5" seems about right. i'm sure someone has built such a rifle on a weatherby or hh length action. i'm wondering if anyone here has heard of such a beast

 

[Antelope_Sniper]

1/8.5 sounds way to fast. Is the E-tip that much longer???

 

[JD338]

A 1:10 twist will stabilize the 180 gr E Tips. Your OAL will be governed by the magazine. You can also go with a Wyatt box to increase your magazine length.

JD338

 

[FOTIS]

From a regular twist barrel (1:10") you will get....

Cartridge : .300 Win. Mag.(R)
Bullet : .308, 180, Nosler E-Tip preliminary
Cartridge O.A.L. L6: 3.700 inch or 93.98 mm
Barrel Length : 24.0 inch or 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 85 63.60 2475 2448 32167 10809 95.3 1.510
-18.0 88 65.19 2537 2573 34298 11121 96.4 1.471
-16.0 90 66.78 2600 2702 36582 11411 97.3 1.433
-14.0 92 68.37 2663 2834 39034 11678 98.2 1.396
-12.0 94 69.96 2725 2969 41667 11920 98.8 1.359
-10.0 96 71.55 2788 3107 44495 12134 99.4 1.323
-08.0 98 73.14 2850 3247 47538 12319 99.7 1.288
-06.0 100 74.73 2912 3389 50809 12474 99.9 1.253
-04.0 103 76.32 2974 3534 54344 12596 100.0 1.215 ! Near Maximum !
-02.0 105 77.91 3035 3680 58153 12704 100.0 1.178 ! Near Maximum !
+00.0 107 79.50 3095 3828 62268 12808 100.0 1.142 !DANGEROUS LOAD-DO NOT USE!
+02.0 109 81.09 3155 3978 66718 12907 100.0 1.107 !DANGEROUS LOAD-DO NOT USE!
+04.0 111 82.68 3214 4130 71541 13001 100.0 1.073 !DANGEROUS LOAD-DO NOT USE!
+06.0 113 84.27 3274 4283 76770 13090 100.0 1.040 !DANGEROUS LOAD-DO NOT USE!
+08.0 115 85.86 3333 4439 82458 13174 100.0 1.008 !DANGEROUS LOAD-DO NOT USE!
+10.0 117 87.45 3392 4597 88648 13252 100.0 0.978 !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 107 79.50 3218 4138 76613 12313 100.0 1.053 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 107 79.50 2906 3376 50012 13186 98.2 1.254

 

[baltz526]

can you run that with h1000 with standard length and the 3.70" i would like to see what pressure a etip test i have loaded, for the next time the sun comes out. it is an under book max load for Partition length bullets, but the etip is at max compression. now i'm wondering if i should shoot the 3

 

[FOTIS]

Cartridge : .300 Weath. Mag.
Bullet : .308, 180, Nosler E-Tip preliminary
Cartridge O.A.L. L6: 3.600 inch or 91.44 mm
Barrel Length : 26.0 inch or 660.4 mm
Powder : Hodgdon H1000

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 90 71.20 2614 2731 35688 10309 92.6 1.514
-18.0 93 72.98 2683 2878 38273 10625 93.9 1.471
-16.0 95 74.76 2753 3030 41070 10922 95.2 1.429
-14.0 97 76.54 2824 3187 44103 11198 96.3 1.388
-12.0 99 78.32 2894 3348 47395 11451 97.2 1.347
-10.0 102 80.10 2965 3515 50974 11678 98.1 1.308
-08.0 104 81.88 3036 3685 54872 11877 98.8 1.265 ! Near Maximum !
-06.0 106 83.66 3107 3859 59124 12046 99.3 1.222 ! Near Maximum !
-04.0 109 85.44 3178 4038 63771 12183 99.7 1.180 !DANGEROUS LOAD-DO NOT USE!
-02.0 111 87.22 3249 4220 68863 12285 99.9 1.140 !DANGEROUS LOAD-DO NOT USE!
+00.0 113 89.00 3320 4405 74455 12352 100.0 1.101 !DANGEROUS LOAD-DO NOT USE!
+02.0 115 90.78 3390 4594 80614 12397 100.0 1.063 !DANGEROUS LOAD-DO NOT USE!
+04.0 118 92.56 3460 4785 87415 12435 100.0 1.027 !DANGEROUS LOAD-DO NOT USE!
+06.0 120 94.34 3530 4980 94953 12465 100.0 0.992 !DANGEROUS LOAD-DO NOT USE!
+08.0 122 96.12 3600 5179 103338 12487 100.0 0.957 !DANGEROUS LOAD-DO NOT USE!
+10.0 124 97.90 3670 5383 112702 12500 100.0 0.924 !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 113 89.00 3453 4766 91014 11792 100.0 1.019 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 113 89.00 3117 3884 60217 12547 96.8 1.208 ! Near Maximum !



Cartridge : .300 Weath. Mag.
Bullet : .308, 180, Nosler E-Tip preliminary
Cartridge O.A.L. L6: 3.700 inch or 93.98 mm
Barrel Length : 26.0 inch or 660.4 mm
Powder : Hodgdon H1000

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 88 71.20 2584 2669 34404 10325 92.1 1.537
-18.0 91 72.98 2652 2811 36837 10649 93.5 1.494
-16.0 93 74.76 2721 2959 39466 10956 94.7 1.453
-14.0 95 76.54 2790 3111 42307 11244 95.8 1.412
-12.0 97 78.32 2859 3267 45383 11510 96.9 1.372
-10.0 100 80.10 2929 3428 48716 11751 97.7 1.332
-08.0 102 81.88 2998 3593 52333 11967 98.5 1.293
-06.0 104 83.66 3068 3763 56268 12153 99.1 1.250 ! Near Maximum !
-04.0 106 85.44 3138 3936 60552 12310 99.5 1.208 ! Near Maximum !
-02.0 108 87.22 3208 4112 65227 12434 99.8 1.168 !DANGEROUS LOAD-DO NOT USE!
+00.0 111 89.00 3277 4292 70340 12523 100.0 1.129 !DANGEROUS LOAD-DO NOT USE!
+02.0 113 90.78 3346 4475 75945 12581 100.0 1.091 !DANGEROUS LOAD-DO NOT USE!
+04.0 115 92.56 3415 4660 82102 12628 100.0 1.055 !DANGEROUS LOAD-DO NOT USE!
+06.0 117 94.34 3483 4849 88890 12669 100.0 1.019 !DANGEROUS LOAD-DO NOT USE!
+08.0 119 96.12 3551 5041 96395 12702 100.0 0.985 !DANGEROUS LOAD-DO NOT USE!
+10.0 122 97.90 3620 5237 104717 12727 100.0 0.952 !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 111 89.00 3413 4656 85898 11963 100.0 1.044 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 111 89.00 3073 3774 56958 12624 96.3 1.239 ! Near Maximum !

 

[baltz526]

300win mag 3.60"oal h1000 -02.0 105 77.91gr 3035fps 3680fpe 58153 12704 100.0 1.178 ! Near Maximum. this is suspect to me, i find it interesting that nosler lists 75.5gr h1000 as max with a 220gr at 3.340". can you run this 75.5gr at 3.340 with the 220 Partition, just as referance