urbanrifleman
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0 FB - pretty much the same as my Manson reamer.
I can't imagine needing any freebore with a 270 thou long neck.
0 FB - pretty much the same as my Manson reamer.
Agreed. Bearing surface is .235” on the Berger. Freebore will occur naturally over time.I can't imagine needing any freebore with a 270 thou long neck.
That should be enough to get you through the first 2 barrels...I have 2500 of them on hand, bought them when they were being discontinued knowing I’d build a fast 20 at some point. Didn’t know Grafs has them, I’ll probably buy a few more. Thank you
Will see, Jammed with 55 bergers is just above the shoulder neck junction. If they like a .010 jump I might want to throat a bit. Won’t know where the donut is until this brass has been fully fire formed. All that neck is more useful if half empty.I can't imagine needing any freebore with a 270 thou long neck.
Hopefully!That should be enough to get you through the first 2 barrels...
Who’s barrels ya gonna use??….Hopefully!
Not sure, I’ll probably try and land a Mueller. Not sure sure if Zack has any on hand, i need to get the details on that build worked out. It’ll be a priority after the New Year. What barrels have you been using for fast 20 cals?Who’s barrels ya gonna use??….
I forgot to ask Zach last night…
Depending on lot #This might help
Technical Notes
- Caliber: 20 Caliber
- Bullet Weight: 55 Grain
- Product Line: Varmint
- G1 BC: 0.354
- G7 BC: 0.182
- G7 Form Factor: 1.037
- Minimum Twist (or faster): 1:8"
- Ogive Style: Tangent
- Base Style: Boat Tail
- Jacket: J4 Varmint Jacket
- Sectional Density: 0.189
- Bullet Dia.: 0.204
- OAL: 0.908
- Base to Ogive: 0.449
- Nose Length: 0.573
- Bearing Surface: 0.235
- Boat Tail Length: 0.1
We get this done yet ??Not sure, I’ll probably try and land a Mueller. Not sure sure if Zack has any on hand, i need to get the details on that build worked out. It’ll be a priority after the New Year. What barrels have you been using for fast 20 cals?
No, reamer is in but I have 6 rifles in the queue ahead of it. Probably fall or winter I would guess. I’ll be sure to share it when I get it in my hands. Thanks for asking.We get this done yet ??
Well Lefty, Good point. If it wasn't for experimenters where would this sport br ? still muzzle loading?I'm curious why people are doing the bigger 20cal wildcats. Not trying to pick a fight. I'm just generally curious on what the appeal is. I understand the benefits of some of the smaller cartridges like the 20 vartag and 20 practical, but I'm struggling to understand the appeal of the bigger cases like the 20ppc, 20BR, and even the 20-250 in comparison with their 22 cal counterparts.
Just curious
Mark
For what it is worth, I built a bench rifle with a no taper barrel and was able to set it back twice.They are lasers and fur friendly but completely impractical to me. I don’t care anything about a rifle that won’t shoot .250 with regularity, and with 500 rounds of barrel life on a giant 20, regular is out of the question. I can see myself chasing seating depth into the abyss.
I am not a Yote hunter but. air PD's, Helicopters, doubles, triples need velocity.If you ask why my immediate thought is “why not” - granted the big overbore 20 cals aren’t practical in any sense of the word but they are fun and very impressive as far as fast and impacts. When you get into anything overbore, no matter the caliber, practical or ”makes sense” goes out the window imo. Your just venturing in the land of the unpractical.
I’m currently having a 20GT reamer being made at JGS, Im building it just to shoot a pile of 55 grain bergers I have. I think it’ll be fun and don’t mind the impractical side of overbore cartridges. I think it’s fun, to each their own….
I just took delivery of 22-6.5 PRC this summer. I’ve only taken it out a couple times but the two coyotes it dispatched were memorable impacts, talk about a thump! 70 grain accubond at 3625 fps is stout medicine.
Between the 6BR (Remington) and 6.8 SPC it seems like the potential is there. Unfortunately everyone is more focused on the ARC cartridges instead. Not a lot of factory offerings out chambered in a BR variant, and I'm not sure I've ever actually seen 6BR factory ammo in person.The PPC will be dethroned one day! I just it comes from an American round.
Beautiful!Left-6BRAI - 20BRAI- 20-221AI -View attachment 1635290