Any longer Win 308 bullets in 155 gn?

bigHUN

bigHUN

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Starting to reload and tonns of Questions in front of me.
What I got from a friend couple boxes of Sierra MatchKing bullets in 155 gn.
- the Match 2155 is 29.2 mm long;
- the Palma Match 2156 is 30.8 mm long;
Is there anything longer body available I can try? Cannot really go with heavier bullets because the Lapua brass can take no more then 46.6 gn powder, and that allows only shallow seating.
I would like to try how the longer bullet can work out for longer f-class distances.
 
I have tried just about every type of 155 bullet on the market. I always go back to Sierra’s. The 2156 work well. You can do all the testing that you want but I can save you some time and components. 46.0 gr of Varget or 46.0 of VV N-140 with a 2156 seated .020” off the lands, in a Lapua case and touched off with either a Federal 210m or CCI BR primer will stay super sonic past 1000 yards. Very important when using electronic targets. MV will run between 2950 and 3000.
 
The Lapua .30 155 is about 32.39 mm and they work extremely well. Jim Paton used these for years and is Canada's top TR shooter. I haven't seen it, but have been advised that Litz says that they have a higher BC than any other jacketed bullet

Regards,

Peter
 
The problem I got into, and I am seeing - or predicting... is the distance from (shorter 2155) bullet to the rifling lands when in chamber...
The powder I got is a full can of Hodgson H380, Lapua cases and cannot recall what primer but I will check with a friend next time I see.
A friend mismanaged the longer Sierra 2156 bullets (boxes), he said he has them but turn out cannot find these.
That loaded amo was 76.95mm OAL. Also I had a "problem" chambering that length, always I had to wiggle it with tip of my finger and chamber it again.
So a friend now pressed a (shorter 2155) bullet deeper to 72.7mm OAL. Just couple pieces to try @ 300 grouping.
My confusion comes from the increased distance to a land.
I assume the "jump" over the space can wear the rifling over time.
This why was my OP question.
If I can find either the 2156 = with less powder let say 46gn (or less).
 
The Sierras are very forgiving with respect to bullet jump. Doubt very much if there is a difference in barrel life related to jump.
The VLD bullets like the Lapua or Berger may be less forgiving than the Sierras (or Hornadys or Noslers) in this regard.
If you are shooting FTR, you will be single loading, so overall cartridge length is not an issue. A length measurement from base to leade contact point on the bullet ogive is more meaningful. You can experiment with different distances from ogive to leade, but the advice given by maynard is sound, and will result in ammunition with excellent performance. I have found that combination results in a slightly compressed load - probably a good thing from the standpoint of uniformity. A 155 at that velocity performs really well.
You can experiment with ammunition to your heart's content, and maybe use up a lot of barrel life in the process. Getting out to the range and learning how to shoot in the wind can be more useful.
 
We had a family day @ Bull Meadow where rifles chambered for Berger 215 grain and heavier, shot Lapua factory .308 Win. 155 grain ammo
(2.795" OAL) and almost everyone could hold the bull to 500m. Steven noticed the additional windage required compared to the Berger 215s.

Regards,

Peter
 
Palma, DCRA, etc. limit .308 bullets to no more than 156gr.
I have observed that 154 Scenars perform noticeably better in the wind than 2155 Sierra 155s. The VLD design is more efficient.
An efficient bullet at appropriate velocity is as good as it gets.
 
peterdobson said:
The Lapua .30 155 is about 32.39 mm and they work extremely well. Jim Paton used these for years and is Canada's top TR shooter. I haven't seen it, but have been advised that Litz says that they have a higher BC than any other jacketed bullet

Regards,

Peter
Click to expand...

Litz examination of the Lapua 155gr Scenar.

https://appliedballisticsllc.com/wp...Testing-of-the-Lapua-308-155-grain-Scenar.pdf

I've got these coming out of my 25" 308 at a touch under 3050 fps, which keeps them supersonic out to about 1200 yds here in S Alberta.
 
Thus was the result of shooting Hornday 155 ELDM's in a 308.
However I was just messing around with a different rifle than I normally shoot.
This one is an F/0 class rifle, not in my wheelhouse( TR guy here and mostly .223)
but it does show the potential in switching wind
Cat
 

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iron cat said:
Thus was the result of shooting Hornday 155 ELDM's in a 308.
However I was just messing around with a different rifle than I normally shoot.
This one is an F/0 class rifle, not in my wheelhouse.
but it does show the potential in switching wind
Cat
Click to expand...
Did you ever shoot the 155 Amax? It was my go to and running out. I’m split between the ELDM and maybe the Sierra TMK to replace.
 
peterdobson said:
The Lapua .30 155 is about 32.39 mm and they work extremely well. Jim Paton used these for years and is Canada's top TR shooter. I haven't seen it, but have been advised that Litz says that they have a higher BC than any other jacketed bullet

Regards,

Peter
Click to expand...
That's what pops runs. Keeps telling me, that he needs to pay you a visit to get more. What his Sam Adam rifle likes.
 
Donny Fenn1 said:
Did you ever shoot the 155 Amax? It was my go to and running out. I’m split between the ELDM and maybe the Sierra TMK to replace.
Click to expand...
Yup , shot the Amax for a bit as well as 168's , 175,s ,178's etc
The danged rifle just plain shoots!
Mick McPhee barrel, Rangesports butt stock by Paul Reibin, and a forend built by Ed Begg.
It's an open class gun however. As I stated, not F/TR.🙂
Cat
 
Got off the phone with pops. He said with the 167 grn Laupa sceaner, best 10 shot groups at 100 was .582" But his gun was built for the 155s. At 300 put the rounds between the eyes on the hun head.

I'm sure they will work good in your gun.
 
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