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155 Scenars and 5r milspec

Dusty

Sergeant
Full Member
Minuteman
Apr 21, 2003
173
3
Louisiana
Does anyone have a good load using these and varget powder? I have been using 175's and had good results with them, but I got some 155 scenars to try and put them together with 210m primers, 45.5gr. varget in a IMI match case. It looked more like a shotgun pattern than a group. Groups where about 1.5 in. to the right of my standart 100 yd. zero, but dead on as far as elevation. From there they would go high about an in. and back and forth in between. Bolt was a little sticks opening and primere where a little flat. Any suggestions
 
Re: 155 Scenars and 5r milspec

I don't know....go easier on the powder???

Seriously have you searched through the 308 loads in the reloading forum. If I remember correctly there is a multipage thread dedicated to just the 155 scenars. Probably wouldn't take very long to find a couple of fresh starting points.
 
Re: 155 Scenars and 5r milspec

Measure the outside diameter of the scenar and you will come up with .307" if you measure the 175smk it will be .308"+. I'm not sure if this has anything to do with it but I know with my personnal experience I had groups that would shoot 1/4moa at 100yds then open up to 2' of vertical at 600yds. I suspected the smaller bullet diameter for the unexplained vertical and went to the bergers.
 
Re: 155 Scenars and 5r milspec

I have loaded for 2 5R's with 155's and bothe shot best at 46.6 grains with remington brass. I have chrono 'd these loads and we see 2878 avg speed. Do whatever you need to get the speed up to 2900fps and load out to 2.900 or so. YMMV
Rob
 
Re: 155 Scenars and 5r milspec

I am going to try it with win. brass and see if I can get the velocity up without the pressure signs. When I clocked the load above it avg. 2830.
 
Re: 155 Scenars and 5r milspec

I tried 46.6gr. of varget and the 155 in a Win. case. The bolt wasn't sticky and the primers were not flattened much, but still getting the same horizontal stringing of about 1.5 in. left to write. I checked my npa before every shot and they all broke dead center of the dot. The vertical dispersion is around .5in.

I don't think this is me doing this, because when I shoot my standard 175SMK load it is a solid .5 to .75 MOA. Could horizontal dispersion of the group just be barrel harmonics with this load?
 
Re: 155 Scenars and 5r milspec

Lapua brass, 46.2gr RL15 2.855" OAL and CCI-BR2 primers gave me 2900 out of my 5R

46.6gr gave me 2930 but accuracy wasnt as good as 46.2gr

There is another accuracy node at 46.9gr RL15 but I never got a chance to test that load, traded the rifle for a USO.

Please do NOT try these loads with anything but Lapua brass and CCI-BR2 primers!
 
Re: 155 Scenars and 5r milspec

I use them in my FTR-class matches. 600 and 1K yds. I shot 579 with 19X's, and 575 with 15 X's last 2 times out at 600. My best string at 1K has been 191 6X. I am a newbie and only been competing a year. I have alot to learn reading the wind. If you run these bullets hard you can compete, especially at 600. I get zero vertical errors, but I let my gun down regularlly on the horizontal. Heavier bullets make wind deflection decrease, but I am after the one bullet for every distance load. I can shoot 100-1000 with this bullet.
YMMV-Rob
 
Re: 155 Scenars and 5r milspec

Does the 155 have a real advantage over the 175SMK? I noticed that on the JBM ballistic tracjectory chart, there wasn't much wind drift diffrence at 1K when you used the G7 BC for the 155 at 2900fps. There was less drop which would be a little more forgiving in unknown distance errors. All of this is on paper, so what is the real world experiences with it?
 
Re: 155 Scenars and 5r milspec

I meant in a standard bore size, I know some palma shooters shoot a 'tight' bore. There is no arguing the consistency of the scenars in fact I tried seperating them by bearing surface and gave up after about 20 bullets, they are amazingly consistent. I didn't know if thier smaller diameter contributed to the vertical I was experiencing in a standard bore size or not.
 
Re: 155 Scenars and 5r milspec

A friend of mine shoots 155's out of his 5R with Lapua brass and Varget. He has trouble getting more than 2800fps out of it. 155's seem to be quite a bit more finicky than 175's so load development is more tedious. Keep trying until you find something that works.
 
Re: 155 Scenars and 5r milspec

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Dusty</div><div class="ubbcode-body">What is the bore size in a standard 5R?
</div></div>

.300 bore, .308 groove standard. .299 bore, .307 groove 'tight bore'
 
Re: 155 Scenars and 5r milspec

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: criver</div><div class="ubbcode-body">"Anybody had much luck with the scenar at 600yds?"
John Lewis set the IBS 600 yard heavy gun record with 155 Scenars .411 inch for five. </div></div>

It was .386"
 
Re: 155 Scenars and 5r milspec

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Dusty</div><div class="ubbcode-body">Does anyone have a good load using these and varget powder? I have been using 175's and had good results with them, but I got some 155 scenars to try and put them together with 210m primers, 45.5gr. varget in a IMI match case. It looked more like a shotgun pattern than a group. Groups where about 1.5 in. to the right of my standart 100 yd. zero, but dead on as far as elevation. From there they would go high about an in. and back and forth in between. Bolt was a little sticks opening and primere where a little flat. Any suggestions </div></div>

What OAL are you loading to?
 
Re: 155 Scenars and 5r milspec

All I use is 155 Scenars. I have a tube gun that I built, and a 5R. Needless to say the tube gun cost me a lot more than the 5R. The 5R will out shoot the tube gun with varget loads in Lapua brass and 155's. Both rifles have great optics. One a leupy 8.5 x 25 the other is a US optics 3.2 X 17 X 44. Both have 25 moa rails. The us optics is on the Tube gun with a 26" barrel in 11-1. Nothing wrong with the tube gun, it shoots well, but it just will not shoot as well as the 5R.