30-06 XL7 165gr HPBT

[bullet]

Here is my load work for my hunt this coming week with my Marlin 30-06 XL7 using a 165gr Sierra HPBT in front of over 58grs of W760, Rem brass, Rem 9 1/2M primers.

NOTE: No pressure signs and easy ejection.

High velocity was 3016fps and Low was 3003fps and Average was 3008fps

 

[DrMike]

Very good, Mike. I'd say you are set for about anything you'll hunt this coming week.

 

[bullet]

Very good, Mike. I'd say you are set for about anything you'll hunt this coming week.

Yes, I will start with the Big 8 and try to bloody it first then the 06

 

[FOTIS]

Nice work Mike!

 

[bullet]

Yeah, but I need to check my chrono, I am 50fps faster than the load is suppose to do in a 22" barrel.

 

[CatskillCrawler]

I was thinking they were hot too.

 

[bullet]

I was thinking they were hot too.

I worked up to this load, in fact, I almost went through a box of these 165gr HPBT working up. The base has not expanded to much, the primers are fine and the ejections is effortless. The Mark v 06 I had would do this and more with this load. This would be hot for some 06's and it is not over max for mine.

 

[bullet]

The 180gr North Fork SS
Grains: 180
Hi Vel: 2892
Low Vel: 2830
Ave Vel: 2852
Ext Spread: 62
Std Dev: 26

 

[bullet]

I have already planned on backing down to around 2920fps -2930fps and not because of any functioning problem with my 06 but just to be on the safe side because the velocities are high even though the primers are fine, and the base has not expanded to much and it ejects fine, I am still going to lower the velocities.

 

[SJB358]

Looks like a sweet load. That 180 load is trucking Mike..

 

[kraky1]

I think you are doing the right thing bringing down those velocities. It would be my guess those 165's in the 3000+ range are doing about 67-69k pressure. It is NOT uncommon with rem brass not to see pressure indicators in this range.
If you had some federal brass with like capacity...and usually fed and rem brass are very close in the 06 I think they would have "spoken" to you about that load while the rem brass stayed silent.

 

[bullet]

I think you are doing the right thing bringing down those velocities. It would be my guess those 165's in the 3000+ range are doing about 67-69k pressure. It is NOT uncommon with rem brass not to see pressure indicators in this range.
If you had some federal brass with like capacity...and usually fed and rem brass are very close in the 06 I think they would have "spoken" to you about that load while the rem brass stayed silent.

Yeah, you point is valid. I am going to have my friend do a strain test on my rifle with that load when i get back from my hunt to let me see where it really was. :mrgreen:

 

[SJB358]

I think you are doing the right thing bringing down those velocities. It would be my guess those 165's in the 3000+ range are doing about 67-69k pressure. It is NOT uncommon with rem brass not to see pressure indicators in this range.
If you had some federal brass with like capacity...and usually fed and rem brass are very close in the 06 I think they would have "spoken" to you about that load while the rem brass stayed silent.

Yeah, you point is valid. I am going to have my friend do a strain test on my rifle with that load when i get back from my hunt to let me see where it really was. :mrgreen:

I'd like to see it as well too Mike. Not throwing stones at all, just be interested.

Cartridge : .30-06 Spring. (SAAMI)
Bullet : .308, 165, Sierra HPBT 2140
Useable Case Capaci: 62.675 grain H2O = 4.069 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Winchester 760

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 90 54.81 2638 2549 44405 10298 93.9 1.213
-09.0 91 55.42 2668 2608 45949 10423 94.4 1.194
-08.0 92 56.03 2698 2668 47539 10544 94.9 1.176
-07.0 93 56.64 2729 2728 49185 10661 95.3 1.158
-06.0 94 57.25 2759 2789 50895 10775 95.8 1.140
-05.0 95 57.86 2789 2850 52660 10885 96.2 1.123
-04.0 96 58.46 2819 2912 54481 10991 96.6 1.105
-03.0 97 59.07 2850 2975 56362 11093 97.0 1.088 ! Near Maximum !
-02.0 98 59.68 2880 3039 58310 11191 97.4 1.072 ! Near Maximum !
-01.0 99 60.29 2910 3103 60330 11285 97.7 1.056 ! Near Maximum !
+00.0 100 60.90 2940 3168 62424 11374 98.0 1.040 ! Near Maximum !
+01.0 101 61.51 2970 3233 64595 11458 98.3 1.024 !DANGEROUS LOAD-DO NOT USE!
+02.0 102 62.12 3001 3299 66848 11537 98.6 1.009 !DANGEROUS LOAD-DO NOT USE!
+03.0 103 62.73 3031 3365 69184 11612 98.8 0.993 !DANGEROUS LOAD-DO NOT USE!
+04.0 104 63.34 3061 3432 71610 11682 99.1 0.978 !DANGEROUS LOAD-DO NOT USE!
+05.0 105 63.95 3091 3500 74128 11746 99.3 0.964 !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 60.90 3080 3476 75128 11140 100.0 0.962 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 60.90 2752 2774 50278 11003 91.7 1.141


QL suggests you might be in the 66K range, but QL is really just a good guesstimator till you put the rubber where it meets the road.

 

[bullet]

Hey I am curious to now. I am assuming it will only be between 64500 and 65500, I would be surprised if it was higher, but then I have been surprised before. Fixing to get in the truck and take my trip, wish me luck. :mrgreen: :mrgreen:

 

[CatskillCrawler]

A friend with a strain gauge is a friend to keep!

Yeah, I wasnt trying to accuse or sarge you up Mike. Whenever I see established velocity/bullet weight norms exceeded I immediately see the red flag going up the pole. I've seen enough of your load work-ups to recognize that you're not the impulsive type. You seem to like to find the upper edge of the envelope and then work to a safe and accurate level once that high water mark has been established.

 

[bullet]

Yes, in doing so i have always been able when working back down to find a very accurate load withgood velociy.

 

[bullet]

Frankly, I think my load with the velocities I got could be to close to the edge if not over even though my rifle did not act like it was at max pressure or not. Will be lowering my velocities by at least 70fps until I see the results of the strain gauge.

Yes I am back and no cigar, did not get to bloody the Big 8 or 06, we got rained out, in fact it rained so much that the swamp we hunt flooded so bad that we could not get to our stands.

 

[SJB358]

Wow, now that is alot of rain!

 

[DrMike]

I do hate hunting in the rain; and that is quite a bit of moisture, Mike.

 

[bullet]

We got at the camp 6.45" in 8 hours and what you see is not the water that is still coming because that whole area drains into that swamp. They got more coming to night. Jerry will have to use hip waders by this week end to get into the camp.