1-8 twist for 55 grain .20 cal Bergers?

[L.Sherm]

I would never build a big 20 to shoot high volume anything to many other 20's for that.
If you wanna shoot past 400 its hands down the way to go.
Theres alot of bullets that run side by side to 400 its 500 and beyond is were it separates the men from boys so to speak.

 

[Gabe22BR]

53Vmax G1 BC is .290 I send them at 3850. Now compare to 400yds max. 1-1/2” drop 3” wind. I can hold either on a coyote. I would burn up a 20 cal barrel too quick on Pdogs so it won’t get compared on small pups.

My bad- I was looking at wrong BC Hornady bullet.. you right-!!!

As for that drop chart- hummm

I zero my 20BRAI at 100yds
It’s only 7.25moa up to 600yd zero… .25moa left-
- Real world experience-

 

[Gabe22BR]

I would never build a big 20 to shoot high volume anything to many other 20's for that.
If you wanna shoot past 400 its hands down the way to go.
Theres alot of bullets that run side by side to 400 its 500 and beyond is were it separates the men from boys so to speak.

You need a longer barrel, & 1.250” + diameter-

Agree, other smaller cases are more suitable for high volume shoots

 

[L.Sherm]

To add a little more to it why does Berger say 1-12 or faster for there 40gr 20 cals when there's alot of barrels out there that 12's won't shoot them or other 40's

 

[Woollybugger]

My bad- I was looking at wrong BC Hornady bullet.. you right-!!!

As for that drop chart- hummm

I zero my 20BRAI at 100yds
It’s only 7.25moa up to 600yd zero… .25moa left-
- Real

My bad- I was looking at wrong BC Hornady bullet.. you right-!!!

As for that drop chart- hummm

I zero my 20BRAI at 100yds
It’s only 7.25moa up to 600yd zero… .25moa left-
- Real world experience-

7.25 moa at 600 matches well when run at G7. I’m smitten by the easy 22 GT alpha case. I have one each 22 GT and 20 GT barrels with another of each on the way.

 

[nakneker]

Yes Stan was testing the 55's, I actually made the barrel its a 3G9 did not do the chambering.

Awesomeness!

 

[nakneker]

I think it’s time to ask Zack at ODCR to order a Muller #3 1-9. The reamer came months ago, I just needed to get a few projects out of the oven before starting this one.

I’m currently using a Muller on my 20-222, I’ve been very pleased with every aspect of that barrel.

Thanks for all the input, it was very helpful and appreciated.

 

[Evan]

Just putting this out there: my 20 Vartarg has 2300 rounds through it, minimal firecracking, running 55gn Bergers at 3050 all the way up to 3150fps, and still gets down into the 1.5” range at 600yds everytime I take it out that far. Unless you’re hunting at unknown distances, the extra powder and speed isn’t necessary.

 

[Woollybugger]

I think it’s time to ask Zack at ODCR to order a Mueller #3 1-9. The reamer came months ago, I just needed to get a few projects out of the oven before starting this one.

Thanks for all the input, it was very helpful

 

[Gabe22BR]

Woollybugger​

I don’t understand your ballistic program- if it works for you great-

I know it’s just a 7moa from 100yd zero for me- to 600yds- it’s been repeated dozens of times- on my rifle- … I seen very few ballistic programs to be accurate, as user imput was incorrect-/not complete- the Berger cal. will be really close-

 

[Tommie]

53Vmax G1 BC is .290 I send them at 3850. Now compare to 400yds max. 1-1/2” drop 3” wind. I can hold either on a coyote. I would burn up a 20 cal barrel too quick on Pdogs so it won’t get compared on small pups.

Nobody that I know of is shooting 55’s in high volume. That bullet is best used for shots beyond 400 (or 500) yards. If a person is shooting high volume at extended ranges they’re likely going to burn the barrel. Normally they’ll usually relocate closer and switch to smaller cartridges.

After extensive field experience with prairie dogs I’ve shelved my 17, 22 and 24 caliber rifles. The 20’s are that good.

 

[RegionRat]

Nobody that I know of is shooting 55’s in high volume. That bullet is best used for shots beyond 400 (or 500) yards. If a person is shooting high volume at extended ranges they’re likely going to burn the barrel. Normally they’ll usually relocate closer and switch to smaller cartridges.

After extensive field experience with prairie dogs I’ve shelved my 17, 22 and 24 caliber rifles. The 20’s are that good.

Not going to disagree.

I don't bother with 55s unless we are talking along the lines of 3650 fps or more.

I love to shoot the big wildcat 55s out past 400 yards when the rest of the folks are dealing with the closer ones. That way, they don't feel like I am shooting the ones they could have tried.

When I am by myself, I will burn up 204R bbls running 40 VMax or 39 SBK without a care and yet I also love to go the whole day with a 17 HMR just for the challenge. Life is too short to worry about brass or barrels.

It took me a while to learn how life works. I had to retire before I got to the point where I realized that life was too short to worry about burning up barrels. I just started having them made two or three at a time and keep shooting.

I have lost too many old friends, outlived too many great gunsmiths, and who knows how long "they" will let us keep doing this, anyway that was my epiphany moment, and I hope we all have more epic days in infested prairie dog colonies. YMMV

 

[Woollybugger]

Woollybugger​

I don’t understand your ballistic program- if it works for you great-

I know it’s just a 7moa from 100yd zero for me- to 600yds- it’s been repeated dozens of times- on my rifle- … I seen very few ballistic programs to be accurate, as user imput was incorrect-/not complete- the Berger cal. will be really close-

You said earlier it was 7.25 moa at 600. That is exactly what this calculator says with the berger 55gr G7 at 3850. So I don’t understand your concern.

 

[L.Sherm]

You said earlier it was 7.25 moa at 600. That is exactly what this calculator says with the berger 55gr G7 at 3850. So I don’t understand your concern.

I'm thinking you were referring to the 53 v-max at 7.25 moa at 600 thats what I got from it.

 

[Woollybugger]

I'm thinking you were referring to the 53 v-max at 7.25 moa at 600 thats what I got from it.

I only updated the calculation from 400yd to 600yds max and it matched Gabe's numbers for the 55 berger, so I trust the calculator. I have both the 20 GT and the 22 GT and both are great A buddy chambered both an 8 and a 7T and is having trouble blowing up 55 bergers with both of his. Mine is fine but old stock bullets, I have a 9T in his lathe now. The 22 GT is of course not as flat shooting past 400 but more versatile when it comes to a choice in bullets. And at 3850 the 53vmax or the 52gr berger fb have been just as accurate.

 

[L.Sherm]

I only updated the calculation from 400yd to 600yds max and it matched Gabe's numbers for the 55 berger, so I trust the calculator. I have both the 20 GT and the 22 GT and both are great A buddy chambered both an 8 and a 7T and is having trouble blowing up 55 bergers with both of his. Mine is fine but old stock bullets, I have a 9T in his lathe now. The 22 GT is of course not as flat shooting past 400 but more versatile when it comes to a choice in bullets. And at 3850 the 53vmax or the 52gr berger fb have been just as accurate.

Well I dont know how a .290 B.C 22 bullet is gonna fly like a 55 20 call .340 if your saying its 7.5 moa for both then something is not right because when I've punched in a .290 BC bullet at 3850 its more like 8.5 moa.
Personally I could care less about numbers.
This thread was suppose to be about the 20 cal 55's but it turned into one about the awesomeness of the 53 V-Max

 

[Tommie]

Side note: Berger originally listed the 55’s BC at .381 and in my gun that is more real-life than the “new” BC number.

 

[L.Sherm]

Side note: Berger originally listed the 55’s BC at .381 and in my gun that is more real-life than the “new” BC number.

I'm on board with that Tommie I think the .354 or whatever it is is conservative, in my findings it is

 

[Evan]

I'm on board with that Tommie I think the .354 or whatever it is is conservative, in my findings it is

I got to 1000yds with 28MOA which, using JBM, suggests a G7 of 0.181 or a G1 of about 0.354. I am going slower, so that reduces the effective BC. For those curious, it was only able to shoot 10” groups out there.

 

[Woollybugger]

Well I dont know how a .290 B.C 22 bullet is gonna fly like a 55 20 call .340 if your saying its 7.5 moa for both then something is not right because when I've punched in a .290 BC bullet at 3850 its more like 8.5 moa.
Personally I could care less about numbers.
This thread was suppose to be about the 20 cal 55's but it turned into one about the awesomeness of the 53 V-Max

I didn’t say a 53 would be at 7 moa. I only updated the calculator to get to 600 yards and it matched your 7.25 moa at 600. Look at the image, it says berger 55gr at the top and 7.25 moa at the bottom. I just was checking the calculator. The 53gr is at 8.74 moa at 600.