Have Remington 700 ADL. Needs 3 screw trigger job and wonder if anyone could help with the barrell twist. 7 mm Remington magnum. Getting ready to reload some ammo and wondering if it will shoot 139 grain Hornady SST okay. I had the 7 mag in a Tikka hunter and it really liked 165 gr Sierra Game Kings.
Anyone have idea of barrel twist in Remington ADL
- Thread starter Wendyj
- Start date
Jim Watson
New member
The thing is, it will shoot the 139 Hornady ok if it SHOOTS it ok.
It will be stable but only shooting your ammo in your rifle will determine accuracy.
It will be stable but only shooting your ammo in your rifle will determine accuracy.
You can check it yourself with your cleaning rod. Using your cleaning rod & brush, Remove your bolt, when the brush goes into the rifling, mark the rod at 12 oclock position at the start of your action & up by the handle. Push the rod in & as the rod turns,when it makes 1 turn to the 12 oclock position mark at the handle, put a mark at the start of your action, remove the rod, measure the two action marks. that will give you your twist rate. If it measures 9" from point to point, your twist is 9" in one complete turn. Hope I helped
green_MTman
New member
this is one of the biggest problems for 7MM shooters and reloaders any 7mm excluding the ultra mags that are likely firing 160 gr or better.
problem 1.its a good 350 yd plus hunting tool so overstablization is an issue.an over stablized bullet wont manifest itself untill about 350 yards unlike the understablized bullet that is a problem after the first 55 yards.
1 in 11" twist is ideal for the 140 gr,so if you want to shoot deer at 500 yards the 1 in 11" twist is manditory.its either a deer only rifle or hunt deer with 160 gr fast expanders if you want a 1 in 9.5" twist elk or moose shootable gun.
shooting 140 gr spitzers from a 9.5" twist will only work to about 350 yards which a 7mm-08 can handle for deer anyway,this is why the 7mm-08 always has a 1 in 11" twist and people use the 140 gr A frame for elk.
lets break in down;
1 in 11" twist = a 600 yard deer rifle in 7mm magnum but will shoot 5 inch groups at 100 yards in the 160 gr bullet types.
1 in 9.5 = a 350 yard elk rifle and 350 yard deer rifle as well for the 140 grainers will start going end over end after about 300 to 375 yards.the 150 gr swift scciracco might remedy this sitiuation and keep end over ending at bay to maybe 500 or so which honestly is long enough to deer.
1 in 8" good for the 175 gr tripple shock and other 175 gr copper bullets and works with 180 gr lead bullets and the 210 gr lead RN but only real Deutsche and Spanish Mausers shoot those although they are available to reloaders.the 7-57 mauser was conceived with a 1 in 8" twist or that metric equivelent.
but the 1 in 8" is more for the ultra mag,STW or 7mm dakota.
another honest ad to the pint post from me that should not be ignored but will be
problem 1.its a good 350 yd plus hunting tool so overstablization is an issue.an over stablized bullet wont manifest itself untill about 350 yards unlike the understablized bullet that is a problem after the first 55 yards.
1 in 11" twist is ideal for the 140 gr,so if you want to shoot deer at 500 yards the 1 in 11" twist is manditory.its either a deer only rifle or hunt deer with 160 gr fast expanders if you want a 1 in 9.5" twist elk or moose shootable gun.
shooting 140 gr spitzers from a 9.5" twist will only work to about 350 yards which a 7mm-08 can handle for deer anyway,this is why the 7mm-08 always has a 1 in 11" twist and people use the 140 gr A frame for elk.
lets break in down;
1 in 11" twist = a 600 yard deer rifle in 7mm magnum but will shoot 5 inch groups at 100 yards in the 160 gr bullet types.
1 in 9.5 = a 350 yard elk rifle and 350 yard deer rifle as well for the 140 grainers will start going end over end after about 300 to 375 yards.the 150 gr swift scciracco might remedy this sitiuation and keep end over ending at bay to maybe 500 or so which honestly is long enough to deer.
1 in 8" good for the 175 gr tripple shock and other 175 gr copper bullets and works with 180 gr lead bullets and the 210 gr lead RN but only real Deutsche and Spanish Mausers shoot those although they are available to reloaders.the 7-57 mauser was conceived with a 1 in 8" twist or that metric equivelent.
but the 1 in 8" is more for the ultra mag,STW or 7mm dakota.
another honest ad to the pint post from me that should not be ignored but will be
Jim Watson
New member
Wow, I haven't seen anything about an 11 twist 7mm since Harvey Donaldson was writing.
Remington says they use 1 in 9.25 for 7mm Mag. So does Academy Sports who have an ADL for sale.
"...it really liked..." This is the important part. Follows Rule Number One. If it works. Don't fix it.
"...5 inch groups at 100 yards..." That's ludicrously poor accuracy with any hunting rifle.
"...a 600 yard deer rifle..." There's no such thing. Certainly no rifle that only shoot 5" at 100 is capable of hitting a deer's vitals at 600. Not enough energy left with a 160 grain bullet either.
"...the pint post..." Too many pints?
"...it really liked..." This is the important part. Follows Rule Number One. If it works. Don't fix it.
"...5 inch groups at 100 yards..." That's ludicrously poor accuracy with any hunting rifle.
"...a 600 yard deer rifle..." There's no such thing. Certainly no rifle that only shoot 5" at 100 is capable of hitting a deer's vitals at 600. Not enough energy left with a 160 grain bullet either.
"...the pint post..." Too many pints?
green_MTman
New member
actually a 7mm rem mag carries over 1000 ft lbs of pressure at 600 yards.this is the same forum where people say they killed an elk at 600 yards with a .243 or killed an elk at 800 yards with a AR style .308.and im mocked for pointing out a 7mm mag could kill deer at 600 yards.
a 1 in 11" twist is standard for the 140 gr bullet this is fact
yes if you shot a 160 grain bullet out of a 1 in 11" twist you would get wide groups at 100 maybe or maybe not exactly 5 inches.
yes an over stabized bullet would turn end over end at some point,often about 350 yards maybe more or maybe less
what is unfactual about my post
a 1 in 11" twist is standard for the 140 gr bullet this is fact
yes if you shot a 160 grain bullet out of a 1 in 11" twist you would get wide groups at 100 maybe or maybe not exactly 5 inches.
yes an over stabized bullet would turn end over end at some point,often about 350 yards maybe more or maybe less
what is unfactual about my post
Jim Watson
New member
I doubt that last bit is factual. "Overstabilized" bullets are pretty rare.
I have not worked with 7mm, but:
I know that a 10 twist .30, originally chosen for the 220 gr .30-40 Krag shoots quite well with a 155 gr .308 Palma load. I know for sure it does not go "end over end" at 350 yards. Or 1000 yards.
I know that a 6.5 twist .223, bought for 90 gr SMKs will blow a 75 gr Amax up with a top load, but reduced a bit to stand the spin, it does not go "end over end" at 350 yards. Or 600 yards.
Yes, a slower twist can do a bit better in those cases, but there I see no huge effect of "overstabilization."
Why would a 9 twist 7mm be so horrible with a 140 gr bullet?
I have not worked with 7mm, but:
I know that a 10 twist .30, originally chosen for the 220 gr .30-40 Krag shoots quite well with a 155 gr .308 Palma load. I know for sure it does not go "end over end" at 350 yards. Or 1000 yards.
I know that a 6.5 twist .223, bought for 90 gr SMKs will blow a 75 gr Amax up with a top load, but reduced a bit to stand the spin, it does not go "end over end" at 350 yards. Or 600 yards.
Yes, a slower twist can do a bit better in those cases, but there I see no huge effect of "overstabilization."
Why would a 9 twist 7mm be so horrible with a 140 gr bullet?
Sure Shot Mc Gee
New member
Older ADLs_1-9 __Newer models_1-9-1/4 I do believe.
http://www.deltagunshop.com/clearwater_reboring/factory_twist_rates.html
http://www.deltagunshop.com/clearwater_reboring/factory_twist_rates.html
green_MTman
New member
this is the first time ive heard of people not knowing this stuff.this forum is weird at times.
Ridgerunner665
New member
Overstabilization of rifle bullets is a myth...
For a scientific and illustrated explanation of why...buy Bryan Litz's books and read them.
A quote from "Modern Advancements in Long Range Shooting", by Bryan Litz.
A high degree of stability has been proven to actually improve the BC of bullets...examples are 1 in 8" twist for 30 caliber bullets, 1 in 7" for .277 and .284 bullets.
Another thing...as bullet go downrange, they become more stable, not less...the least stability is always at the muzzle.
I could show the proof...but that would mean showing more of Bryan's books...not gonna do that...he put in the hard work to do all that testing and writing...pay the man back by buying and reading his books...you'll be a better rifleman for it.
For a scientific and illustrated explanation of why...buy Bryan Litz's books and read them.
A quote from "Modern Advancements in Long Range Shooting", by Bryan Litz.
A high degree of stability has been proven to actually improve the BC of bullets...examples are 1 in 8" twist for 30 caliber bullets, 1 in 7" for .277 and .284 bullets.
Another thing...as bullet go downrange, they become more stable, not less...the least stability is always at the muzzle.
I could show the proof...but that would mean showing more of Bryan's books...not gonna do that...he put in the hard work to do all that testing and writing...pay the man back by buying and reading his books...you'll be a better rifleman for it.
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green_MTman
New member
there are no online articles i could imediatley find.most of what i know comes from talking to people