What length & twist for suppressed .44 Mag subs?

[Big-Boy]

I'm looking to put together a .44 Magnum SBR & Suppress it.

I would like it to be accurate to 100-150 yards and able to take deer, maybe even hog with sub sonic loads.

I'm thinking heavier bullets due to the slower velocity. Maybe 300gr range. I'm also looking at a barrel with a faster twist rate to accommodate the heavier bullet.

At the moment I've been looking at www.mcgowenbarrel.com. Thinking 11" barrel to keep things from being overly long with the addition of the suppressor. They provide twist rates of 1:10 or 1:18.

What twist rate should I be going for and will I be able to get ok accuracy and knockdown at 100 yards out of an 11" barrel?

[Tatume]

What's an SBR?

Welcome to the forum!

[Outpost75]

Short Barrelled Rifle (Less than 16") http://www.thetruthaboutguns.com/2012/10/daniel-zimmerman/want-a-short-barreled-rifle-heres-how/

[Kestrel4k]

I'm looking to put together a .44 Magnum SBR & Suppress it.
I would like it to be accurate to 100-150 yards and able to take deer, maybe even hog with sub sonic loads. [...]
I've been working with .44Mag subsonic recently and the trajectory is truly a challenge.
Best-case, a 100-yd zero yields a scary +3.5"@50y, -5.3@125y, and -13"@150y.
Usable accuracy past 100 yds is also certainly an unknown.

I am still getting very good results with my factory twist of 1:20 so 1:18 would be by far the better choice over 1:10 IMO, but others here may have contrary opinions of course.

What is your rifle platform of choice?

[rosst]

30 caliber subsonic bullets are very good killers, sometimes where you put the bullet is more important than size . . . and certainly a lot of choices in molds, components for the .30s

i tried big .45s and found the .30s were just as good and easier to shoot at longer range .. . R

[rosst]

I've been working with .44Mag subsonic recently and the trajectory is truly a challenge.
Best-case, a 100-yd zero yields a scary +3.5"@50y, -5.3@125y, and -13"@150y.
Usable accuracy past 100 yds is also certainly an unknown.


you really need to have a dialup scope to get any kind of range, combined with something like the Burris Zee rings with inserts . .. my present scope with subsonics is 6XLeupold with .5MOA clicks and 30MOA per rev - 2 revs and 60MOA gets me out to +400yrds

[Big-Boy]

I've been working with .44Mag subsonic recently and the trajectory is truly a challenge.
Best-case, a 100-yd zero yields a scary +3.5"@50y, -5.3@125y, and -13"@150y.
Usable accuracy past 100 yds is also certainly an unknown.

I am still getting very good results with my factory twist of 1:20 so 1:18 would be by far the better choice over 1:10 IMO, but others here may have contrary opinions of course.

What is your rifle platform of choice?

Wow, those are some pretty big holdovers.

Most likely using a Marlin 1894

[Outpost75]

Here is drop data for a .44 Remington Magnum (Pistol Data), Cor-Bon Hardcast, 320gr at subsonic velocity:


Range
Drop
(inches)
Velocity
Energy
Wind drift
(inches)
Time
(milliseconds)


A
A
A
A
A


0
-0.9713
1075
821
0.0000
1


25
2.3640
1045
776
0.0000
72


50
3.7110
1019
738
0.0000
144


75
2.9654
995
703
0.0000
219


100
0.0260
974
674
0.0000
295


125
-5.2057
954
647
0.0000
373


150
-12.8263
935
621
0.0000
452


175
-22.9310
918
599
0.0000
533


200
-35.6144
902
578
0.0000
616


- See more at: http://gundata.org/ballistic-calculator/#sthash.zUORcbMl.dpuf

Very little difference for a 240-grain bullet at similar velocity.

- See more at: http://gundata.org/ballistic-calculator/#sthash.2nNdQ01P.dpuf

[Big-Boy]

So trajectory being known,

Would a 1:10 overturn the projectile? Should I stick with 1:18?

[Outpost75]

1:18 should be ample for a 320- grain flat nose subsonic in .44

[longbow]

I was/am toying with making a .44 "Whisper" by using a long heavy boolit. I scaled down a Dr. Richard Gunn design for subsonic 0.457" boolit to 0.433" and it came out at just over 400 grs.

Only big issue is so much lead sticking out of the brass would require either a very long throat or a nose/bore riding design and it wouldn't feed through any "normal" .44 mag action so would have to be a single shot or converted Lee Enfield or similar.

I'm stalled by both lack of money and too many other things to get done currently.

Here is the Gunn boolit design:

163689

I'd like that in .44!

Longbow

[bikerbeans]

LB,

A rebarreled 336 marlin would give plenty of OAL for your 44 whisper. I have three 336s that I have rebarreled to 44 cal; 44-40, 445sm and 444m-1.8". There are some modifications required for loading and feeding, but nothing too serious. This would give you a OAL of over 2.5" so should work with your 400g slug.

BB

[longbow]

I like the .44 idea because I have lots of brass but effectively it would be a wildcat and wouldn't fit any standard .44 mag rifle or handgun (unless it was a nose/bore rider then single shots would take it).

Of course the crimp groove would have to be moved it retained.

That design should be ideal in .45-70 for the .45 and .444 Marlin for a .44 version but I like the idea of the long lead in short brass.

I'd just like to see someone try out this design. If I had the time and money I would get one done in .44 mag single shot rifle as it would only need a long throat then be good to go. That would be fairly inexpensive too.

I figured 1:18" to 1:20" twist for this boolit at 400 grs. in .44.

Longbow

[Lloyd Smale]

ive shot deer at a 100 yards with 4 inch 44 mag handguns so a 10-11 inch barrel will work fine. Id do it with a 1-16 to 1-18 either would work fine with slow 300s. What your making is proabably the BEST suppressed deer combo you could think up.

[6pt-sika]

I;ve done the SS suppressed thing with 5 or 6 bolt action 308's and a couple 223's . Even used cast in one of the 308's and it worked pretty well for deer to 100 yards . Using a 220 grainer in a 30 cal with a dead on sight in at 100 yards I was if memory serves 3 inches high at 25 yards , 3 1/2" high at 50 yards and 2 inches high at 75 yards . The 223 I don't remember but I used a 60 grainer in that and I would have been skeptical about using it past 50 yards for deer .

After fooling with this stuff I wanted to take a old 1-38 twist 444 Marlin lever action and do the SS thing with a 300 grain cast bullet and it didn't work . I then tried a 280 grain cast bullet and it didn't work , went to a 265 grainer again no cigar after that I just gave up on the idea . I never did try it in my 1-20 ballard rifled 444 I just might give it a go this summer for the heck of it !

[6pt-sika]

I like the .44 idea because I have lots of brass but effectively it would be a wildcat and wouldn't fit any standard .44 mag rifle or handgun (unless it was a nose/bore rider then single shots would take it).

Of course the crimp groove would have to be moved it retained.

That design should be ideal in .45-70 for the .45 and .444 Marlin for a .44 version but I like the idea of the long lead in short brass.

I'd just like to see someone try out this design. If I had the time and money I would get one done in .44 mag single shot rifle as it would only need a long throat then be good to go. That would be fairly inexpensive too.

I figured 1:18" to 1:20" twist for this boolit at 400 grs. in .44.

Longbow

With my 1-20 ballard 444 and some of my 390-420 grain bullets if I use that crummy old short Hornady LE brass it just might be the ticket !

[6pt-sika]

I was/am toying with making a .44 "Whisper" by using a long heavy boolit. I scaled down a Dr. Richard Gunn design for subsonic 0.457" boolit to 0.433" and it came out at just over 400 grs.

Only big issue is so much lead sticking out of the brass would require either a very long throat or a nose/bore riding design and it wouldn't feed through any "normal" .44 mag action so would have to be a single shot or converted Lee Enfield or similar.

I'm stalled by both lack of money and too many other things to get done currently.

Here is the Gunn boolit design:

163689

I'd like that in .44!

Longbow

I have a 450 grain plain base mold that was cut at Mountain Molds , either Mt Sourdough gave it to me or I traded him something for it . That one would be very close to this 480 grainer in the 45 Colt . 444 SS with 1-20 might just be a little interesting . The big issue is the cost of s suppressor for a 44 cal . We sell them and everytime I talked to one of our distributers about one the price was approx. DOUBLE of what a 30 cal can goes for WHOLESALE .

[Big-Boy]

The big issue is the cost of s suppressor for a 44 cal . We sell them and everytime I talked to one of our distributers about one the price was approx. DOUBLE of what a 30 cal can goes for WHOLESALE .


SilencerCo Hybrid should take care of that issue.