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New Load

13 Feb 2019
@ 08:19 am (GMT)

Andrew Murray

Hope all are well!

I am looking for some advice on load dev if you'd all be so kind. I recently received some Norma 7mm08 brass. I have since resized it to 30cal and I am looking to do up a close range load to complement my LR/Zmax load. The Zmax is the 168gr with 47.5gr of AR2208 (2811fps) very accurate.

I have some 150gr Sierra gamekings and 150 Speer BT soft points (nearly identical to the GKs). They are old. So age annealed... I am wondering if it is worth getting the MV down to 2650 to help them not explode on impact? Maybe even lower to say 2550 fps. ?

I want to avoid bullet blow up. Target animals will be small to medium game at likely no more than 100yds. Maybe 150 in a pinch. Beyond this I will swap back to the z max load.

Cheers everyone.

Replies

13 Feb 2019
@ 08:58 pm (GMT)

Paul Leverman

Re: New Load
Hi Andrew. Yes, doing well, thank you. Et vous?

I haven't played with loads yet, but was curious how the resizing went. Obviously, some turned out. How was your loss ratio, if any? Any problems?

My Hornady manual indicates 2300fps as their safe slow load. I'm guessing you'll have to play to find a compatible load to maintain POI.
14 Feb 2019
@ 09:12 am (GMT)

Andrew Murray

Re: New Load
Paul! Great to hear from you.

The resizing was fine. Not cases lost, no obvious visible damage to any cases. Lubed outside and down the neck then through the full length resizing die. Cases are quite long though. 53mm compared to my limit of 51.2mm before being trimmed so will lose a lot of material. I will proceed with caution.

2300fps could be a great place to start. It would be nice to have one hole groups but the reality of the situation doesn't call for it. They are only for close range shots so a wider group would be acceptable to a certain degree. All that to say I won't be chasing the accuracy (and time/effort) like I did with the Zmax load.

I am wondering if maybe anyone has had experience with the Speer and Sierra 150gr BTSP/GameKing who could offer some insights.

Great to hear from you Paul!
14 Feb 2019
@ 12:36 pm (GMT)

Warwick Marflitt

Re: New Load
How about a slow Z-max load? MV 2200fps so that the bullets at the right speed for it to work? Just colour the cases RED for full power and Green for low. One bullet set up for two jobs. Funny how we all think more speed. I this situation at that range. You want Z bullet at X speed to get Y expansion. So a Z Max doing 1800fps @ 150yrds ? Do the arithmetic and work it out. ...... heck you'll probably use less powder and everything else stays the same. Primer, case, projectile.! What's not to like? Correct me if I'm wrong but it looks like a cheap solution to this requirement of stopping bullet blow up?
I can't see a reason why slowing the bullet to its sweet spot velocity not to work.....😆
14 Feb 2019
@ 02:02 pm (GMT)

Andrew Murray

Re: New Load
Yeha that's not a bad idea Waz...

The new cases can help with it... I've only got 77 Winchester cases and 37 Norma ones. I think the Norma brass is softer? So the slower load could help quite a lot... But I've also been handed a number of projectiles, roughly 250... A mix of the Sierra and Speer 150gr ones. I think the GameKings are about 1mm longer, probably even less...

The idea being not only to develop a second load but also to experiment and learn a little. Not that such a thing won't happen using the Z Max projectiles at a lower speed, but more variables means more learning essentially. I am thinking this load will be good with AR2206H, my Z max load has AR2208 behind it which may help its 2811fps velocity be a thing, that or the sheer amount of it, 47.5grs...

But yes, I hear what you're saying. Slowing that projectile down to function in it's sweet spot is a great idea, but not one I want to try at this point. It's all fun and learning.

Here's the Speer 150gr BTSP


And the 150gr GameKing
14 Feb 2019
@ 03:58 pm (GMT)

Paul Leverman

Re: New Load
Andrew - the following link has some outdated info, but does contain some powder comparisons, like using TraiBoss or SR4759, for reduced loads. It also contains a reference to the Lyman #49 manual. The Lyman loads start at 2403fps (IMR 4895/ AR2206H) up to 2717fps (BL-C(2)/AR2206); these are their starting loads.

If you don't have the Lyman manual, I can scan it and post in the Test forum for you.

Hope this will lead you somewhere:

https://forums.gunboards.com/showthread.php?471417-SR-4759-for-reduced-jacketed-rifle-loads
14 Feb 2019
@ 04:04 pm (GMT)

Paul Leverman

Re: New Load
Don't know why I didn't include this above, but the A-MAX loads in the Lyman manual start at 2253fps, and indicate that a 44.0gr load of H-414 (AR2209) has the potential to be the most accurate.
14 Feb 2019
@ 09:15 pm (GMT)

Warwick Marflitt

Re: New Load
That's good Andrew. I'm sure that you'll have fun learning.
Me....... I'm a bit of a cheat and just do what Nathan recommends in the KB and his books. Because it works for me. When you get to meet Nathan and Steph. You learn and see a very practical down to earth caring and loving couple. Driven and Committed to do and share their hard earned data. As they both say. You can't buy the shot.
I'll say that you can buy the data and information to make the shot possible, to achieve. As you've discovered yourself ! Why I do it this way is to save money and time. Buy what works load test adjust and go. You can't bullshit a bullshitter! Is what my mate says. Enjoy your journey......
14 Feb 2019
@ 09:49 pm (GMT)

Andrew Murray

Re: New Load
Cheers mate!

While I'm on the subject... has anyone had any thoughts around annealing the boat tail of these soft point style bullets? Placing the tip in water so it doesn't melt out and hitting the bum with a blow torch? The idea being to help energy transfer with the tip being brittle from age but the boat tail end being pliable and soft with the view to aid pentrestion rather than fragmentation?

Any merit to the idea or nah?
 

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