cohunt
Well-Known Member
he said browning a-bolt 2 -- should be 1:9.5 twist
depending on altitude, temp, and speed--his twist my not be enough for this bullet to fully stabilize it
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Bullet for 7wsm for deer hunting.
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depending on altitude, temp, and speed--his twist my not be enough for this bullet to fully stabilize it
codyadams
Well-Known Member
@RockyMtnMT is the owner, just send him a pm or call at 406-261-0010. Great guy to talk to.
Coffee hasn't kicked in yet this morning. I see that now.
It could be the twist rate. ON Nosler's web based load data, they recommend a 1:9" twist for the 168gr ABLR in 7RM:
However, for the 7 WSM they recommend a minimum of a 1:9.5" twist:
Max velocity is slightly faster for the RM, so not sure why a faster twist is recommended for the RM over the slower WSM.
codyadams
Well-Known Member
That is the reason I went with a 7mm Sherman Maxx in my most recent build for my wife instead of a 7 wsm, simply for the ADG brass. I have heard murmurs though that some is coming.....
codyadams
Well-Known Member
Marketing? Ha ha. My only guess.
shootallday
Well-Known Member
it's a Browning A-bolt ii I'm more worried how deer they would be in the case, the base of the boattail is lower than the shoulder of the case.
my buddy said his 26" 1 -8 was not stabilizing them to well.
shootallday
Well-Known Member
Thanks, I my contact him. And see what he thinks is best.
Do you have a modified case and a set of Hornady OAL gauges and calipers to see how deep the throat on your rifle is? That would allow you to check if you're going to have issues with seating depth (along with checking how long your overall cartridge can be in your magazine box).
I would have expected a 1:8" twist to have no trouble stabilizing this bullet. Was he seeing oblong shaped holes in his targets, or just a less than stellar pattern?
If you do go with the hammers you will not be disappointed there are a few folks that dont like them but most do for very good reasons
shootallday
Well-Known Member
I have more throat then mag length so that should not be the problem. I made a case and checked it one time but can't remember. My mag is about 2.860
my buddy has the Christensen arms ridgeline in 280ai, believe he was getting strange groups far out.
In my case, I was getting holes at 100yds that were, ummm, less than round. Not quite real keyholes, but definitely not neat round circles. I wonder if the true minimum twist for this bullet is really much closer to 1:9" than 1:9.5".
On the Nosler load data page I included the link for earlier, they show a COAL of 2.825 and the highest load density was at 98% for the three powders listed. None were compressed. It doesn't seem like seating too deep into the case should be a problem.
shootallday
Well-Known Member
Thanks for all the info guys, this maybe a long shot. My man deer rifle is a ruger m77 ts 7x57' I'll use up the last of the 140 Sierra pro hunters this season. Is there a bullet that could pull double duty that will work in the 7x57 and the 7wsm. I also have a 09 Argentine mauser that a 7x57ai but probably won't get used this season.
I don't mind spending money on good bullets, tho money is tight being out of work, but if I could get away with one bullet for all 3 that would save me money even if there more money per bullet.
I don't mind spending money on good bullets, tho money is tight being out of work, but if I could get away with one bullet for all 3 that would save me money even if there more money per bullet.
shootallday
Well-Known Member
ya could be, guess it's just a recommendation every barrel asks different.
