20 BR
- Thread starter pfeb
- Start date
Iam in the process of building a 20 BR -.195" short. It's being called the little stubby as it will be short and fat. In my opinion the 20 BR has too much powder capacity for the standard 20 caliber bullets unless you shoot heavy bullets, then you might as well go with the 22BR, and shoot the 50 grain bullets.
Just my opinion.
Michael
Just my opinion.
Michael
Pete I'm having Dave Kiff grind the reamer, Kevin Weaver from Weaver Rifles out of Peyton Colorado is putting it all together and he is going to be making the dies as well.
As for the cases, if you not familiar with Blaine Eddy's "Plate" you need to be, if you want to make some of these wildcats.
It uses a series of holes stepped down in size to decrease the neck diamater.
For this case's I'll be using lapua 6BR brass and I will need to push the shoulder back and will use a 7BR forming die shortened up some, and then will be running the cases through the plate. Here's what a 22BR .185" short looks like.
Send me an email if I can answer any more questions.
Michael
As for the cases, if you not familiar with Blaine Eddy's "Plate" you need to be, if you want to make some of these wildcats.
It uses a series of holes stepped down in size to decrease the neck diamater.
For this case's I'll be using lapua 6BR brass and I will need to push the shoulder back and will use a 7BR forming die shortened up some, and then will be running the cases through the plate. Here's what a 22BR .185" short looks like.
Send me an email if I can answer any more questions.
Michael
Is anyone else having issues with excessive powder fouling in a .20 caliber barrel?
My .20 BR "sludges" up after 10 to 12 rounds and accuracy goes down hill.
I've tried everything from Benchmark to H414 and changed primers with very little success in reducing the amount of fouling.
I use Sweet's, Butches and Proshot along with Mercury Engine Tuner. Most of the time with these products, barrel cleaning isn't that bad.
The slower powders such as Varget, VV#N-140 and VV#150 leave a black tar residue that is a bear to get out.
It looks if I'm going to shoot a .20 caliber as a pdog gun it will have to be rechambered to .20-222.
Any one have any ideas?????
My .20 BR "sludges" up after 10 to 12 rounds and accuracy goes down hill.
I've tried everything from Benchmark to H414 and changed primers with very little success in reducing the amount of fouling.
I use Sweet's, Butches and Proshot along with Mercury Engine Tuner. Most of the time with these products, barrel cleaning isn't that bad.
The slower powders such as Varget, VV#N-140 and VV#150 leave a black tar residue that is a bear to get out.
It looks if I'm going to shoot a .20 caliber as a pdog gun it will have to be rechambered to .20-222.
Any one have any ideas?????
I go 50 rounds in between cleaning with my 20BR in the field. I shoot one box of ammo then clean. Easy to keep tracj that way. If I go longer than 50 then I will start to get slight hard carbon fowling in front of the throat, which I remove with Iosso. I use N133 which is very clean burning. You would think that it might be a tad fast for this cartridge but it works well for me.
I had a 17 Rem that required cleaning after 10 rounds to maintain accuracy. This is why I no longer have a 17 centerfire. It seems the .20 caliber hole is just big enough to avoid the powder fowling problems I had with my 17 centerfire.
I will say that now that I have tried quite a few 20s I think the sweet spot for case capacity for the 40 gr. bullets is the 20 PPC. The 20 BR just has too much un-needed capacity for the 40s.
I had a 17 Rem that required cleaning after 10 rounds to maintain accuracy. This is why I no longer have a 17 centerfire. It seems the .20 caliber hole is just big enough to avoid the powder fowling problems I had with my 17 centerfire.
I will say that now that I have tried quite a few 20s I think the sweet spot for case capacity for the 40 gr. bullets is the 20 PPC. The 20 BR just has too much un-needed capacity for the 40s.
Did your gun develop accuracy issues after 10 to 12 rounds....such as 2 to 4 shots in one hole and then flip a
flyer about 3/4" out of the group? My will get silly like this and after cleaning shoot bug holes for about 6 to 8 shots and then loose accuracy again.
I have been thinking the same thing about the extra case capacity and are considering shortening the chamber depth to a .200 short .20 BR to get the case capacity more in line with a faster powder such as VV#n-135 or 133.
The gun won't make a pdog gun with this type of cleaning requirements.
Any comments???
flyer about 3/4" out of the group? My will get silly like this and after cleaning shoot bug holes for about 6 to 8 shots and then loose accuracy again.
I have been thinking the same thing about the extra case capacity and are considering shortening the chamber depth to a .200 short .20 BR to get the case capacity more in line with a faster powder such as VV#n-135 or 133.
The gun won't make a pdog gun with this type of cleaning requirements.
Any comments???
I re-chambered to a .20 caliber 200 short BR and modified dies and case formed 20 cases.
A quick trip to the range gave promising results, shooting a 40 gr. Hornady with 21.5 grs of Benchmark that clocked 3145 avg with an ES of 29. Accuracy was .234, .247 & .249 @100 yds.
I shot 26 rounds without any powder or copper fouling.
I'll know more after next Saturday.
A quick trip to the range gave promising results, shooting a 40 gr. Hornady with 21.5 grs of Benchmark that clocked 3145 avg with an ES of 29. Accuracy was .234, .247 & .249 @100 yds.
I shot 26 rounds without any powder or copper fouling.
I'll know more after next Saturday.
I can now say that a .20 caliber .200 short BR is one sweet shooting cartridge.
To date the rifle is shooting in the low to mid .2's @ 100 yards and less than an inch @ 200 yards when I watch the wind flags and do my part. Berger 40 grain bullets and Vihtavouri N-135 really made the difference.
The last chronograph info was shot with Vihtavouri N-135 with and avgerage of 3554 and an SD of 9.
There is hardly any powder fouling and I have been able to fire 28 rounds without flyers or loss of accuracy.
To date the rifle is shooting in the low to mid .2's @ 100 yards and less than an inch @ 200 yards when I watch the wind flags and do my part. Berger 40 grain bullets and Vihtavouri N-135 really made the difference.
The last chronograph info was shot with Vihtavouri N-135 with and avgerage of 3554 and an SD of 9.
There is hardly any powder fouling and I have been able to fire 28 rounds without flyers or loss of accuracy.
Upgrades & Donations
This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.