140 or 160? Now accepting advice.

cowboy · Mar 27, 2018

Dougfirtree said:
Huh. I was under the impression that shortening OAL generally lowered velocity....

Shortening the OAL or in other words seating the bullet deeper reduces the combustion space in the brass - thus increasing pressure upon ignition which results in increased velocity.

The example velocity chart above is very typical although as mentioned it will vary based on powder, bullets, brass etc.

Dougfirtree · Mar 27, 2018

cowboy said:
Shortening the OAL or in other words seating the bullet deeper reduces the combustion space in the brass - thus increasing pressure upon ignition which results in increased velocity.

The example velocity chart above is very typical although as mentioned it will vary based on powder, bullets, brass etc.

Yeah, I guess that makes sense for the same powder charge. I think I was getting things turned around in my head because a longer OAL increases the potential for higher velocities, by enabling larger powder charges at the same pressure level.

OhHeyThereBen · Mar 27, 2018

Brian in Montana said:
My 7-08 seems to like a couple different combinations of 140grn Accubonds and Varget.

Somebody else mentioned 139grn Interbonds, I did an exhaustive search for them and came up with nada. I don't know if Hornady is planning to discontinue the interbond in that caliber/weight, but there seem to be none in the world presently.

I can't seem to find any Interbonds in stock at stores in Fargo even for .30 caliber. That's at Scheels and Mills Fleet Farm, so probably not the world's greatest sources. But I was a bit dissapointed that I couldn't find any. I like Hornady's stuff.

VikingsGuy · Mar 27, 2018

OhHeyThereBen said:
I can't seem to find any Interbonds in stock at stores in Fargo even for .30 caliber. That's at Scheels and Mills Fleet Farm, so probably not the world's greatest sources. But I was a bit dissapointed that I couldn't find any. I like Hornady's stuff.

www.ammoseek.com list a bunch of sources for .257, .277, .284 & .308. In some calibers not all bullet weights are available, but I do see the 154gn in .284 and the .308 in 130gn, 165gn and 180gn.

N2TRKYS · Mar 27, 2018

OhHeyThereBen said:
I can't seem to find any Interbonds in stock at stores in Fargo even for .30 caliber. That's at Scheels and Mills Fleet Farm, so probably not the world's greatest sources. But I was a bit dissapointed that I couldn't find any. I like Hornady's stuff.

I think I saw that Midwayusa had a sale on them now.

Blacktailbc · Mar 27, 2018

You might try some Federal Fusions also. I have found that a lot of rifles like them. They tend to shoot well in just about every rifle I've tried them in.

VikingsGuy · Mar 27, 2018

Blacktailbc said:
You might try some Federal Fusions also. I have found that a lot of rifles like them. They tend to shoot well in just about every rifle I've tried them in.

I have found the same true with Hornady Whitetail - pretty forgiving design along with very average performance.

brymoore · Mar 27, 2018

If 160Abs work I'd buy a box of 140s and see what happens.

N2TRKYS · Mar 27, 2018

VikingsGuy said:
I have found the same true with Hornady Whitetail - pretty forgiving design along with very average performance.

I used a box of those cause they were cheap to get my scope close on my new rifle. My rifle definitely didn't like those and they were crazy slow, too. I don't know why, they just didn't work for me.

Mthuntinfool · Mar 27, 2018

You might try 139 gr Hornady GMX, I get great accuracy in my 7mm RM with them in hand loads

haiku_rodney · Mar 27, 2018

I have a finnicky 7-08 as well. My current load is 46.5 gr IMR 4350 pushing a Sierra 140 BTSP. This will group under 2" at 200 yds. I have taken numerous Axis Deer with it. I am not sure I would trust using it on an elk of 200 yds. I personally really like Accubonds and have been shooting them in my '06. I just haven't had the opportunity to try them in my 7-08.

std7mag · Mar 27, 2018

Rodney,
Just to make sure i understand...
Your finicky 7mm-08 groups 1 MOA at 200 yard, and you don't trust it to hunt elk???
Ummmm, yeaahhh....

Back to the original poster..

I could not get the Accubonds to group worth a tinkers darn in any of my rifles.
Seems like either it likes them, or it doesn't.
I wouldn't shoot 160's out of a 7mm-08. Bullets seat WAYYY into the casing.

The 139gr. SST, and 140gr. Ballistic Tip seated about 0.020" off the lands should do you well.
Yes, with RL17.
I'm shooting 140 gr. Berger VLD Hunting seated 0.005" off the lands. Cheaper per 100 than Ballistic Tips too.

BuzzH · Mar 27, 2018

Yeah, our 7-08's have been finicky too...

I think I could have tinkered with any of these powders with the 140 AB's and spun up better results. Shot all these groups the same day doing load development for my wifes rifle. Never changed zero either.

VikingsGuy · Mar 27, 2018

BuzzH said:
Yeah, our 7-08's have been finicky too...

I think I could have tinkered with any of these powders with the 140 AB's and spun up better results. Shot all these groups the same day doing load development for my wifes rifle. Never changed zero either.

Do you have velocities on those? Curious, as the guys at 6.5guys claim the can get similar accuracy nodes across multiple powders as long as the hit the velocity points a given gun likes.

BuzzH · Mar 27, 2018

VikingsGuy said:
Do you have velocities on those? Curious, as the guys at 6.5guys claim the can get similar accuracy nodes across multiple powders as long as the hit the velocity points a given gun likes.

The only one I know for sure is the varget load in that rifle, it's...2910. I would speculate the RL-19 is right there too...maybe even a pinchy better velocity, but didn't chronograph that one.

You're right, I should have checked velocity on all of those, but didn't. Sorry about that, I'm not much help.

VikingsGuy · Mar 27, 2018

BuzzH said:
The only one I know for sure is the varget load in that rifle, it's...2910. I would speculate the RL-19 is right there too...maybe even a pinchy better velocity, but didn't chronograph that one.

You're right, I should have checked velocity on all of those, but didn't. Sorry about that, I'm not much help.

With that many accurate choices no reason to at the time, but at some point I plan on putting the theory to the test. I can only hope my work up of a 25-06 round for WY 'lope this fall is half as successful.

BuzzH · Mar 27, 2018

VikingsGuy said:
With that many accurate choices no reason to at the time, but at some point I plan on putting the theory to the test. I can only hope my work up of a 25-06 round for WY 'lope this fall is half as successful.

Make sure to post results, I'd be curious to see what you find. I suspect there could be some truth to the theory.

I'll start packing the chronograph to the range more...I just get in hurry to see how new loads are going to perform.

Just an FYI, in the 2 25-06's I've dealt with IMR4831 and 120 Partitions didn't suck...

BuzzH · Mar 27, 2018

VikingsGuy said:
With that many accurate choices no reason to at the time, but at some point I plan on putting the theory to the test. I can only hope my work up of a 25-06 round for WY 'lope this fall is half as successful.

Was going to mention...if you want to give the 120 partitions a try, think I have about 2k of them and could send you a dozen or so...

N2TRKYS · Mar 27, 2018

I found an accurate load for my 25-06 with RL26 and 110 grain Accubonds.

VikingsGuy · Mar 28, 2018

BuzzH said:
Was going to mention...if you want to give the 120 partitions a try, think I have about 2k of them and could send you a dozen or so...

Thanks for the offer, I may take you up on it later, but I have already started working up my first batch with 100gn TTSX - I am hoping to play with copper for a while if my guns like it.

140 or 160? Now accepting advice.

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