55gr out of a 6mm BR faster that a 55gr out of a 22BR?

[SJC]

I am/was thinking of a .22BR for all general vermin/pests and the odd muntjac, I had thought .20BR but that of course takes away the muntjac so won’t be going down that route. I really just want something that dosn’t drop more than an inch at 200m and the .22BR appears to be able to do this with a 40-45gr projectile (yes, I’ll dial load for the muntjac). However, on running through loads on the Sierra app it appears to suggest the 6mm BR can push a 55gr a couple of hundred feet per second faster than a 55gr from the .22BR and is around the 1” at 200ms. Unfortunately other manuals I have access to have either the .22BR or the 6mm BR, not both, and I’m struggling to draw a comparison. So, my question is; can the 6mm BR genuinely push a 55gr projectile faster than it’s .22 off spring?

I should add this is Norma BR not Remington, not that I’m fully aware of the difference.

I should at it’s a 24” barrel that may get chopped to 22”.

 

[Greener Jim]

I'd expect the 6mm to do better with everything else as equal as possible, simply due to the larger area.

 

[Robs]

Never ceases to amaze why people go for marginal calibres and then ask what to do. There is a reason for bigger faster cartridges. Get a 6mm or more and just get on with it if you want a deer legal but explosive varmint rifle. .243win would fit the bill perfectly. Sorry to be so dismissive but why not go under rather than over.

 

[Edinburgh Rifles]

Same case
Same volume
Same bullet weight

Given the choice between 55gr .224 or 55gr 6mm

I would go .224

I am building a 22ARC in a 1:7” for this reason

I had a 6BR (actually 3!)
Originally ran 105s, then 87s then 75s
Great cartridge but its sweet spot is 75gr and above

You will get bonkers velocity from a 24” 55gr 22BR
Think my colleague is getting 3600 from a 18” barrel and 53gr VMax

You are talking 204 Ruger velocity
Choose your bullet carefully if you dont want a lot of burgers and dog food

 

[SJC]

Greener Jim, Robs, Edinburgh Rifles, thanks you.

Robs, I am regretting righting so much in the original post, it wasn’t required and has lead to answers that are not addressing the question. My question was really just about the variation in velocities for the same weight projectile noted of Sierras app i.e. Sierra suggest a max velocity of 3530ft/s for there 55gr .224 blitz king vs 3760ft/s for there 55gr 6mm blitz king. As Edinburgh has said I’d have expected the same velocities with the 6mm coming up short due to the short fat bullet but the additional speed appear to iron this out. Yes, there is always the option to go bigger, I have bigger but it can make a mess of smaller species and I believe, accepting that you do have to ring its neck a little to get it deer legal, that the 6mm BR is used with good effect on a lot of deer.

Edinburgh Rifle, thank you. I’d have thought the same but according to Seirra it’s not the case and I was simply looking to prove what they where saying as it didn’t add up in my mind, but then the BR family generally does a lot more than is should on paper.

Appreciate the response but will leave this here, there’s no need for further input thank you as I can find out what I need from other sources

 

[jthyttin]

there’s no need for further input

I still answer... just to emphasize that 22cal has vastly better selection of lower weight bullets, especially monolithics. Maybe this will change in the future (monolithics).

(I'm personally contemplating between 22 and 6mm rifle for roe and vermin)

 

[takbok]

I am/was thinking of a .22BR for all general vermin/pests and the odd muntjac, I had thought .20BR but that of course takes away the muntjac so won’t be going down that route. I really just want something that dosn’t drop more than an inch at 200m and the .22BR appears to be able to do this with a 40-45gr projectile (yes, I’ll dial load for the muntjac). However, on running through loads on the Sierra app it appears to suggest the 6mm BR can push a 55gr a couple of hundred feet per second faster than a 55gr from the .22BR and is around the 1” at 200ms. Unfortunately other manuals I have access to have either the .22BR or the 6mm BR, not both, and I’m struggling to draw a comparison. So, my question is; can the 6mm BR genuinely push a 55gr projectile faster than it’s .22 off spring?

I should add this is Norma BR not Remington, not that I’m fully aware of the difference.

I should at it’s a 24” barrel that may get chopped to 22”.

You'll always get higher velocity with the same pressure from a larger bore with the same case capacity cartridge.

At the end of the day it comes down to personal choice though. Whichever way you go, make sure that it's a fast twist barrel to handle a wide range of bullets. I think the 6BR is a good choice. The only reason I'd choose 22BR is the better selection of lighter weight lead free bullets, as there's not much below 80gr in 6mm.

 

[Bowland blades]

I am/was thinking of a .22BR for all general vermin/pests and the odd muntjac, I had thought .20BR but that of course takes away the muntjac so won’t be going down that route. I really just want something that dosn’t drop more than an inch at 200m and the .22BR appears to be able to do this with a 40-45gr projectile (yes, I’ll dial load for the muntjac). However, on running through loads on the Sierra app it appears to suggest the 6mm BR can push a 55gr a couple of hundred feet per second faster than a 55gr from the .22BR and is around the 1” at 200ms. Unfortunately other manuals I have access to have either the .22BR or the 6mm BR, not both, and I’m struggling to draw a comparison. So, my question is; can the 6mm BR genuinely push a 55gr projectile faster than it’s .22 off spring?

I should add this is Norma BR not Remington, not that I’m fully aware of the difference.

I should at it’s a 24” barrel that may get chopped to 22”.

I find it a good idea to look at what range you will use any rifle and for what species . Total drop is the least of your worries hunting as this is taken care of by maximum point blank range set up. BTW why a BR ? There is a reason or two why folks like 223, 22-250 ,222 over the benchrest range of cartridges and that is feeding from a mag, availability of ammo and stock design for purpose .

 

[JockStalk]

220 swift

 

[ColinBr]

Same case
Same volume
Same bullet weight

Given the choice between 55gr .224 or 55gr 6mm

I would go .224

I am building a 22ARC in a 1:7” for this reason

I had a 6BR (actually 3!)
Originally ran 105s, then 87s then 75s
Great cartridge but its sweet spot is 75gr and above

You will get bonkers velocity from a 24” 55gr 22BR
Think my colleague is getting 3600 from a 18” barrel and 53gr VMax

You are talking 204 Ruger velocity
Choose your bullet carefully if you dont want a lot of burgers and dog food

Let me know how you get on with the 22ARC.

It's on my list for my next build

 

[GWP]

22-250 job done plenty of rifles and ammo no feed issues

 

[Twodogs]

I find it a good idea to look at what range you will use any rifle and for what species . Total drop is the least of your worries hunting as this is taken care of by maximum point blank range set up. BTW why a BR ? There is a reason or two why folks like 223, 22-250 ,222 over the benchrest range of cartridges and that is feeding from a mag, availability of ammo and stock design for purpose .

Somebody forgot to tell my BR’s that they don’t feed from a mag.
Only 6BR factory ammo I’ve come across is purpose designed for ISCM 300m, so along with the .22 will need to be hand loaded. Components being plentiful.
Stock design for purpose? Surely depends on the chosen action etc.

From reading numerous forums the general census of opinion is that the .22BR will run neck and neck with the .22-250, using less powder, more accurately and with less barrel wear. The 6BR will of course run 105/107/108 grain bullets.

Free choice is a right to be much valued.

 

[soother223]

I’ve a BR for sale on here which I’ve used for the last few years on vermin. It’s been nothing short of lethal! Anything I can help you with just pm me...

 

[Farmerjoe]

I get 3870fps with a 50gr SBK out of my .22br. Absolutely devastating, easy point and shoot out to 300 yds.Has a 24” barrel. Purely a fox/vermin rifle.

 

[Bowland blades]

Somebody forgot to tell my BR’s that they don’t feed from a mag.
Only 6BR factory ammo I’ve come across is purpose designed for ISCM 300m, so along with the .22 will need to be hand loaded. Components being plentiful.
Stock design for purpose? Surely depends on the chosen action etc.

From reading numerous forums the general census of opinion is that the .22BR will run neck and neck with the .22-250, using less powder, more accurately and with less barrel wear. The 6BR will of course run 105/107/108 grain bullets.

Free choice is a right to be much valued.

The difference between BR and regular hunting ammo design is actually quite close cartridge to cartridge and reading the wind first cold bore shot, no real exactness of aim dissipates any obvious advantage in the ammo . The changes that could be found are of course need to be measured via a vernier calliper

 

[Tobyc064]

I am/was thinking of a .22BR for all general vermin/pests and the odd muntjac, I had thought .20BR but that of course takes away the muntjac so won’t be going down that route. I really just want something that dosn’t drop more than an inch at 200m and the .22BR appears to be able to do this with a 40-45gr projectile (yes, I’ll dial load for the muntjac). However, on running through loads on the Sierra app it appears to suggest the 6mm BR can push a 55gr a couple of hundred feet per second faster than a 55gr from the .22BR and is around the 1” at 200ms. Unfortunately other manuals I have access to have either the .22BR or the 6mm BR, not both, and I’m struggling to draw a comparison. So, my question is; can the 6mm BR genuinely push a 55gr projectile faster than it’s .22 off spring?

I should add this is Norma BR not Remington, not that I’m fully aware of the difference.

I should at it’s a 24” barrel that may get chopped to 22”.

6mm BR could push a 55 grain bullet faster than a .22 BR because the bullets are not as long on the 6mm. Nosler bt are the highest bc for the weight in 55 grain