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7mm-08 Loading

 
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  #1  
Old 07-18-2012, 11:24 AM
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Join Date: Feb 2012
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7mm-08 Loading

I just recently got this caliber for my daughter and started reloading for it. I want to point out at the start that this will be for hunting.

So I started out on a medium load, 45g of IMR 4350 with a 139g Hornady SST. I got a little over 2700fps on velocity. I'd like to get over 2800. She is pretty comfortable with the recoil, as it is less then the Remington Core-Lokt ammo I bought to break the barrel in with.

Since I just really started reloading I'm finding some different info on loads that people are using for this caliber, using various powders. I'm pretty happy with using the Hornady bullets, either Interbond or SST, they both have the same BC. But with these various powders like IMR, Varget, RL15, RL17, etc. I'm wanting to just know in lamen terms what the difference is between these that a beginner like myself would understand.

I realize that all rifles will perform differently with different powders, bullets, etc. and I need to find what will best work in my rifle. I'm just trying to get a feel for these different powders and what might be more advantages for me with respect to each one. This could actually apply to any reloading I do for my other guns as well. I guess that's the beauty of reloading yourself...there are many doors to open and explore.

Thanks for any advice or information you can give me.
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  #2  
Old 07-18-2012, 09:20 PM
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Re: 7mm-08 Loading

What's your barrel length?? I had a m7 stainless 20" barrel many moons ago and used either a 120 with rl15 or a 140 with h414. The h414 would hit 2800 fps in a 20" barrel. It was 10 years ago and I'm not sure about charge weight or primer. I made the mistake of shooting a deer with a 120 with it and got peeved and traded the rifle. The reason I went with h414 is it is more compact than 4350 and slow enough to get to full case for full velocity.

Last edited by Lefty7mmstw; 07-18-2012 at 09:22 PM. Reason: info add
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  #3  
Old 07-18-2012, 10:42 PM
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Re: 7mm-08 Loading

Quote:
Originally Posted by Brentster7189 View Post
[...]
But with these various powders like IMR, Varget, RL15, RL17, etc. I'm wanting to just know in lamen terms what the difference is between these that a beginner like myself would understand.
[...]
differences include...

size & shape of the granules that affects metering and fill capacity

burn characteristics such as temperature sensitivity, how clean, and burn rate which affects the pressure curve and peak pressure developed for a given load

ideally, you're looking for a powder that gives a decent fill ratio and burns nearly completely within the length of your barrel giving the bullet the required muzzle velocity within the pressure limits of your cartridge

people choose powders with different priorities (a) low cost, (b) what's on hand, (c) best accuracy, (d) max velocity, etc...

your loading manual will often bold or have a star by a powder/load that produced the most accurate group(s) in a given test rifle

you can get lots of good suggestions on the internet, but NEVER trust those without double checking with an authoritative source such as a published loading manual or manufacturer's website and working up your load safely for your rifle

be safe and have fun!
richard
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  #4  
Old 07-19-2012, 05:25 AM
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Re: 7mm-08 Loading

My son has a 22" inch savage 7mm-08. It shoots 40.5 grains of Varget with 140 Nosler BT that touch at 100yds. Any hotter and the groups open up. I have shot the 139 SST with this load and the performance is about the same.
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Old 07-19-2012, 12:51 PM
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Re: 7mm-08 Loading

Quote:
Originally Posted by reeldawg View Post
My son has a 22" inch savage 7mm-08. It shoots 40.5 grains of Varget with 140 Nosler BT that touch at 100yds. Any hotter and the groups open up. I have shot the 139 SST with this load and the performance is about the same.
She has a Savage Model 111 Trophy Hunter XP 7mm-08, this is the rifle I am reloading for. I might try some of those other powders out to see how they do.
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  #6  
Old 07-19-2012, 01:07 PM
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Re: 7mm-08 Loading

I got a savage model 14 for my daughter two years ago, I originally started her with 49gr (I think of RL19) and a 140gr AB. Gonna move her to a 150gr Partition, she drew a youth elk Btag in the Missouri River breaks. If I can get it to 2800 with moa out to 300yrds I'll be tickled with it.
__________________
Keep in mind the animals we shoot for food and display are not bullet proof. Contrary to popular belief, they bleed and die just like they did a hundred years ago. Being competent with a given rifle is far more important than impressive ballistics and poor shootability. High velocity misses never put a steak in the freezer.

Joe
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  #7  
Old 07-19-2012, 02:32 PM
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Location: Allen, TX
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Re: 7mm-08 Loading

Quote:
Originally Posted by Brentster7189 View Post
She has a Savage Model 111 Trophy Hunter XP 7mm-08, this is the rifle I am reloading for. I might try some of those other powders out to see how they do.
Just don't get caught up in changing too many variables too fast.

Pick one good set of components that's proven successful for others and do a proper, methodical load workup and you will be rewarded.

Here's another good resource...
7mm Cartridge Guide

-- richard
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