Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Progressive twist rifling
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="feelinducky" data-source="post: 1293663" data-attributes="member: 27274"><p>I have currently been shooting my 270WSM 24" Brux, I'm hoping you guys can help me some questions.</p><p></p><p>I have been using the 129g Barnes LRX trying to get a good load worked out. I have only been able to get a max velocity of about 3100fps and that is with a firm bolt lift. I have not been able to get this bullet to work in my current rifle. I have used many different powders and primer combinations along with seating depth. Never being able to get any decent grouping. The last load I tried was with RL 26 and the groups were average but nothing stellar running about 3050fps. I finally decided to change bullets thinking that maybe my rifle doesn't like this bullet. </p><p></p><p>I tried some 130g Barnes TTSX that I had and began load work up with RL26. Using the book charges were between 66.0g and 69.0g. Book max is 70.3g. With 69g I'm now getting a little over 3400 fps and the groups are looking good, it is my current hunting load.</p><p></p><p>What stumps me is why is there such a velocity spread between these 2 bullets? So I'm wondering is it bearing surface between the 2. I have attached a picture the 129g LRX is on the Left and 130gTTSX is on the left. The LRX has 3 grooves and the TTSX has 4 groves.</p><p></p><p>Funny thing looking at the ballistics with the Berger calculator:</p><p>129g LRX:</p><p>3050fps: 700yds=velocity 1758 drop 101.49 wind (5mph) 19.66</p><p>130g TTSX:</p><p>3400fps: 700yds=velocity1801 drop 87.73 wind (5mph) 20.92</p><p></p><p>With theses numbers if the LRX shot well in my rifle, why should I bother with the extra cost of the LRX? It's not much of an LRX as they advertise.</p><p>Would a progressive twist barrel change some of the pressure problems associated with the LRX bullet?</p><p></p><p>I would like to build a 300WSM for backpack hunting, however, living in California I have to shoot copper bullets only. I'm looking at the Hammer and Cutting Edge bullets to fill my need here. I'm also going to be purchasing a new barrel and was wondering if a progressive twist barrel would help with some of the pressure spikes in the copper bullets.</p><p></p><p>I know that this is just one rifle with 2 different bullets, I'm not stating that this is true for everyone. Does this happen in other rifles? Has anyone else seen this?</p><p></p><p>Thanks for your time.</p></blockquote><p></p>
[QUOTE="feelinducky, post: 1293663, member: 27274"] I have currently been shooting my 270WSM 24" Brux, I'm hoping you guys can help me some questions. I have been using the 129g Barnes LRX trying to get a good load worked out. I have only been able to get a max velocity of about 3100fps and that is with a firm bolt lift. I have not been able to get this bullet to work in my current rifle. I have used many different powders and primer combinations along with seating depth. Never being able to get any decent grouping. The last load I tried was with RL 26 and the groups were average but nothing stellar running about 3050fps. I finally decided to change bullets thinking that maybe my rifle doesn't like this bullet. I tried some 130g Barnes TTSX that I had and began load work up with RL26. Using the book charges were between 66.0g and 69.0g. Book max is 70.3g. With 69g I'm now getting a little over 3400 fps and the groups are looking good, it is my current hunting load. What stumps me is why is there such a velocity spread between these 2 bullets? So I'm wondering is it bearing surface between the 2. I have attached a picture the 129g LRX is on the Left and 130gTTSX is on the left. The LRX has 3 grooves and the TTSX has 4 groves. Funny thing looking at the ballistics with the Berger calculator: 129g LRX: 3050fps: 700yds=velocity 1758 drop 101.49 wind (5mph) 19.66 130g TTSX: 3400fps: 700yds=velocity1801 drop 87.73 wind (5mph) 20.92 With theses numbers if the LRX shot well in my rifle, why should I bother with the extra cost of the LRX? It's not much of an LRX as they advertise. Would a progressive twist barrel change some of the pressure problems associated with the LRX bullet? I would like to build a 300WSM for backpack hunting, however, living in California I have to shoot copper bullets only. I'm looking at the Hammer and Cutting Edge bullets to fill my need here. I'm also going to be purchasing a new barrel and was wondering if a progressive twist barrel would help with some of the pressure spikes in the copper bullets. I know that this is just one rifle with 2 different bullets, I'm not stating that this is true for everyone. Does this happen in other rifles? Has anyone else seen this? Thanks for your time. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Progressive twist rifling
Top