243 slow speeds

[Rustystud]

One of the nations top long range shooter shoots a .243 with 105 Bergers he is running them 3,300 fps.
30+ inch barrel, correct twist, and powder.
I shoot a .243 win with 90 grain Swift Schirocco at 3,219fps out of 20" barrel with sub .5 moa accuracy.
Nat Lambeth

 

[Hoier]

Hard to believe I am running 450fps slower than he is. But my accuracy isn't bad for a factory barrel though.

 

[moorepower]

I would LOVE to see what psi you are running the 6br at to get 243 velocities at 2/3 the powder! I would agree you have a slow barrel. I was getting 2850 with the 243 in a Rem 788 with a book load of RL19 and 105's. I think the 788 is a 22" barrel.

 

[Hoier]

I run 30.7 gr of Varget in my 6br. It doesn't show pressure for me but I would work up to that. But this is my second 6br and my other did the same speed wise but at 30.0gr. Both of my brs aren't very fast barrels, the 6br cartridge page shows guys getting 2900ish and I've never seen that. I think the impressive round is the Dasher for 3 more grains of powder I could get about 3100.

 

[Wildboar]

Hoier,
I don't think you can make a fair comparison between varget in one cartridge and 4831 in another one. Hodgons book MAX is 33gr varget in .243
As some barrels are truly faster than others some barrels like certain powders better. H4831 is definitely not the fastest powder for that class of bullet. I think sup780, h1000, hybrid100, retumbo, 7828, rl-22/25 will all get your speed up. I think! Is your barrel New or old? I know in every rifle I own the velocity increased until around 200rds before leveling off.

 

[matthewusmc8791]

I think u got a sloow barrel. I have a 28" LW that shoots 105 vld-h with 43.0 gr h4831sc@3040. 26" brux that shoots 105vld-h with 43.5gr h4831sc@3025. 24" criterion that shoots 105 vld-h with 42.0 gr h4350@3125. And last a 25.5 Krieger that shoots 107 smk with 42.5 gr h4350 @3090 & 42.0 gr imr4350@3060. The 24" got switched to 44.5 gr of h4831sc@3025 when my h4350 got down to 8 lbs. The 25.5 Krieger got switched over to imr4350 at the same time. I got 10 lbs of imr4350 still and 20 ish lbs of h4831sc. As luck would have it all the h4350 i BO came in stock within a week of each other. Now i got about 35 lbs of it. It took 11 months but i got it. The downside is i got some different powders to burn up before i start back with h4350. All velocities are confirmed at ranges up to 1200 yds.

Thanks for your info. I too am running a new 243. I have a a 30" brux. I am running the Berger 105 Hybrids. I haven't tested on a chrony yet, but the nodes I have hit are 41.5 and 42.5. 5shot groups are .3's at 100yds. Guesstamating from Berger data i'm thinking right around 2800fps +/-. It is a low node and pressure, and I only have to neck size so far, which was my goal. Running through JBM, I can dial out to 1000 with 30+MOA.. My main goal was to get low pressure to save my life of the barrel. Running low and slow does it in a 243. a 105 gr Berger all day to 1000..

so for the original poster, why do you need it fast.. that extra, 100-500 fps doesn't add up to much, but that much pressure sure will burn yrou barrel out... JMTC

 

[Hoier]

Matt

I have a 6br that will out shoot it everyday and twice on Sunday and I see no advantage to running a 243 when a 6br will do what it will only better.

So I decided to rebarrel the rifle in a 6 Dasher.

 

[matthewusmc8791]

Thanks for the info. Im not saying that the 243 is the answer. I'm just saying that it works for me and probably the OP. I never hear anyone saying anything about how often they have to replace barrels. If your running any 6mm and your blasting them at 3300fps with 105grg bullets or heavier, , you definitely are putting undo stress on the barrel. I don't see the benefit to cost ratio leaning towards the shooter for an extra 300-500 fps when shooitng 100+ grain bullets when you can just add a few more MOA to your dope. Not to mention instead of 3000round count you hope to get out of a 6mm, cut it in have cuz your burning it up. JMTC

 

[Raythemanroe]

I have had all of my .243's shoot well, Maybe not 30br or ppc groups but as good as .308's or the like.. Talk about an all around cartridge the .243 is it.. I can shoot bullets up to 115g (with my faster twist barrel) exceptionally well. I don't think I would choose it for point blank paper shooting though

 

[CanusLatransSnpr]

Thanks for the info. Im not saying that the 243 is the answer. I'm just saying that it works for me and probably the OP. I never hear anyone saying anything about how often they have to replace barrels. If your running any 6mm and your blasting them at 3300fps with 105grg bullets or heavier, , you definitely are putting undo stress on the barrel. I don't see the benefit to cost ratio leaning towards the shooter for an extra 300-500 fps when shooitng 100+ grain bullets when you can just add a few more MOA to your dope. Not to mention instead of 3000round count you hope to get out of a 6mm, cut it in have cuz your burning it up. JMTC

That extra 300-500 fps can mean alot in the wind! Not to sound like a smart a$$ but, barrels come with threads for a reason! To be replaced!

Mike

 

[matthewusmc8791]

Thanks for the info. Im not saying that the 243 is the answer. I'm just saying that it works for me and probably the OP. I never hear anyone saying anything about how often they have to replace barrels. If your running any 6mm and your blasting them at 3300fps with 105grg bullets or heavier, , you definitely are putting undo stress on the barrel. I don't see the benefit to cost ratio leaning towards the shooter for an extra 300-500 fps when shooitng 100+ grain bullets when you can just add a few more MOA to your dope. Not to mention instead of 3000round count you hope to get out of a 6mm, cut it in have cuz your burning it up. JMTC

That extra 300-500 fps can mean alot in the wind! Not to sound like a smart a$$ but, barrels come with threads for a reason! To be replaced!

Mike

Hey Mike that is some funny stuff. I agree.. But I think we're loosing focus of the original OP's question.

He was using some H4831sc and wondered if his speed was off because he was chasing that 3000fps number..In my opinion I told him it's not worth it.. Most shooters don't have extra money to thread and chamber new barrels every 2000rounds.

ran JBM real quick and saw using a 105 hybrid put you in some numbers in these ranges; 2800fps-30 then 3100-22 and 3300-19moa.

Yes there is certainly a big different if fps and yes it would help with wind, but it appears he was new shooter and needing help... Rather then telling him to dump a shit load of powder in and get the stupid bullet to go as fast as possible because speed is great, is not productive thing to tell a new shooter. if your worried about wind, your not shooting the right bullet. Trying the 210 bergers or go to the 338 if your bucking that much wind. JMTC.

 

[CanusLatransSnpr]

Thanks for the info. Im not saying that the 243 is the answer. I'm just saying that it works for me and probably the OP. I never hear anyone saying anything about how often they have to replace barrels. If your running any 6mm and your blasting them at 3300fps with 105grg bullets or heavier, , you definitely are putting undo stress on the barrel. I don't see the benefit to cost ratio leaning towards the shooter for an extra 300-500 fps when shooitng 100+ grain bullets when you can just add a few more MOA to your dope. Not to mention instead of 3000round count you hope to get out of a 6mm, cut it in have cuz your burning it up. JMTC

That extra 300-500 fps can mean alot in the wind! Not to sound like a smart a$$ but, barrels come with threads for a reason! To be replaced!

Mike

Hey Mike that is some funny stuff. I agree.. But I think we're loosing focus of the original OP's question.

He was using some H4831sc and wondered if his speed was off because he was chasing that 3000fps number..In my opinion I told him it's not worth it.. Most shooters don't have extra money to thread and chamber new barrels every 2000rounds.

ran JBM real quick and saw using a 105 hybrid put you in some numbers in these ranges; 2800fps-30 then 3100-22 and 3300-19moa.

Yes there is certainly a big different if fps and yes it would help with wind, but it appears he was new shooter and needing help... Rather then telling him to dump a shit load of powder in and get the stupid bullet to go as fast as possible because speed is great, is not productive thing to tell a new shooter. if your worried about wind, your not shooting the right bullet. Trying the 210 bergers or go to the 338 if your bucking that much wind. JMTC.

He isn't a new shooter though! The OP stated he has a 6br and a 6.5x47L so I would have to, and I hate to do this but, "assume" that he knows what he's doing! At the end of the day, it's all about fun and it takes quite a bit to shoot out a barrel! If the barrel's life gets shortened by a 1,000 rounds then I'm going to have to say the shooter had fun doing it!

Mike

 

[willymakit]

I hope we are right, Mike, as I've just went all in for a .243AI. I'm terrible at wind reading and hope the "suds" of the 243AI will help. IMHO
willy

 

[CanusLatransSnpr]

I hope we are right, Mike, as I've just went all in for a .243AI. I'm terrible at wind reading and hope the "suds" of the 243AI will help. IMHO
willy

With enough barrel a fellow can make a 105 sing! There's an accuracy node above the 2,950 fps mark and the AI has enough boiler room to find it.

Mike

 

[willymakit]

I'm using a Brought on 5c, 31"+ long, what is the concensus on bullet coating? I will concentrate on Bergers.
willy