Barrel length & twist questions

Brad615

Well-Known Member
Joined
Apr 18, 2012
Messages
76
Hello All,
Looking for some opinions, and or suggestions for my next project. I'm going to be sending in my 7mm Rem Mag to have a new barrel installed. Should I go with a 27' or 28' barrel, and I'm thinking either a 1-7 or 1-8 twist. I'm doing this for long range accuracy, but also to hunt with. It's a small sporter style barrel so I'm not worried about the weight difference. The bullets I reload love a tight twist so I'm thinking 1.7 twist. For the barrel length is there any noticeable gain in going with a 28' over the 27'? I have heard more accuracy & faster fps with the 28' & I've also heard that there was no noticeable difference?
Thank You,
Brad.
 

Brad615

Well-Known Member
Joined
Apr 18, 2012
Messages
76
The Berger 195’s require a 1-8 (minimum) so my thinking is since I’m having the barrel made & have the option to pick the twist I want maybe go with even more of a twist. Do I need the 7 twist probably not but if it doesn’t hurt or effect the bullet flight except to stabilize it more then why not.? I guess my question is can to much of a twist hurt more then help?
 

sierracharlie338

Well-Known Member
Joined
Feb 18, 2013
Messages
920
Location
Texas
I’d stick with an 8 twist personally. Just don’t think the 7 will give you anything noticeable in performance or speed. Same for barrel length, one inch won’t be a major improvement one way or the other. If it’s a carry rifle go with the shorter.
 

L.Sherm

Well-Known Member
LRH Team Member
Joined
Jul 26, 2017
Messages
3,974
The Berger 195’s require a 1-8 (minimum) so my thinking is since I’m having the barrel made & have the option to pick the twist I want maybe go with even more of a twist. Do I need the 7 twist probably not but if it doesn’t hurt or effect the bullet flight except to stabilize it more then why not.? I guess my question is can to much of a twist hurt more then help?
I know plenty of guys who shoot the 195's in 8.5 and don't want anymore twist than that.
 

brian b

Well-Known Member
Joined
Aug 15, 2004
Messages
331
Location
utah
No way I'd go a faster twist than a 1-8".........
If Bergers are spun too fast they have been known to come un-done (AKA: blow up) before they hit the target, for the most part with 3 groove barrel's. for your project get a 5 or 6 groove barrel
 

Buster Hemlock

Well-Known Member
Joined
Feb 26, 2019
Messages
348
Location
NC
just because your current barrel shoots the 195's well doesn't mean your new one will. So don't put all your eggs in that basket. As far as 27" or 28" nothing significant between the two, couple FPS and a fast 24-26" barrel may outperform your new barrel for velocity if it turns out to be slow, luck of the draw. For twist I'd say 1:8" will do what you want with 195's and less with cup and core bullets, heavy monos you will need faster but even at sea level and 2650 FPS your bullet is stable until you get close to 38* F, increase your altitude some and velocity and your going to be plenty stable at lower temps. Check out Bergers stability calculator and decide for yourself what you need.
 

Brad615

Well-Known Member
Joined
Apr 18, 2012
Messages
76
My original thought was the 1-8 as I feel that will be more then enough but didn’t want to close the door on the 1-7 so figured I’d ask. My current barrel is a 1-9.5 & the 180 vld’s require a 1-9, however I’ve had no problem getting them to stabilize so far so I understand where your coming from L sherm.
 

Brad615

Well-Known Member
Joined
Apr 18, 2012
Messages
76
Thanks for the input guys,
After speaking with the bullet mfg I've decided to go with the 27in barrel & 1-8 twist.
Thanks,
Brad.
 

JMW67

Well-Known Member
Joined
Dec 6, 2012
Messages
2,069
Location
TEXAS
8 is all thats needed I am shooting the 195 in an 8 and having zero issues even the 177 hammer hunter only needs an 8 so you are making the right call
 

imyourhuckleberry

Well-Known Member
Joined
Jun 10, 2009
Messages
300
Location
texas
27" light contour is going to be a whippy sucker. I personally wouldn't go lighter than a 3b in a 27".
I was thinking the same thing. I would recommend at most a 26" barrel. I've seen 27 and 28" barrels leave shot gun patterns at 200 yards. If the OP wants to do long distance with such an excellent cartridge. I would shorten the barrel to 26" or if you want 27 or 28" heavy contour or a tapered contour in 27" would be more suitable. Going to 28" does not gain you much of an advantage, at the most 25 to 30 FPS only. It will be difficult to find OCW with a light 27" but it is doable . Congratulations OP.
 
Last edited:

Brad615

Well-Known Member
Joined
Apr 18, 2012
Messages
76
Sorry technically it’s a sporter contour on a browning xbolt stainless stalker with a 26’ barrel. So there shouldn’t be any issues with whip going to a 27’. I hope lol!
 

Primary

LRH Assistant
Here are some related products that LRH members are talking about. Clicking on a product will take you to LRH’s partner, Primary, where you can find links to LRH discussions about these products.

 
 
Top