The 90smk was super easy in my 22br, jumping 20k at 2900 and 2980 it shoot sub half minute with just a lil powder tweaking.
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22GT load data
- Thread starter Krob95
- Start date
28" pipe. My 22" 22gt will run them up to 3050 before pressure. The heavies should be used with the 170fb 22gt chamber in my opinion.
Very new to 22GT but managed to squeak this group out a couple days ago. Loaded up 5 each in .5gr increments from 33-35gr. H4350 cci450 and 88eld loaded in virgin necked down GAP 6gt brass. After fireforming I will explore that load a little more. Pictured group was shot with 35gr, didn’t chrono any of the ladder loads. But the fireforming load of 34.5gr is averaging 2925fps out of the 20” suppressed barrel. Also plan to try 4831sc
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I’m struggling to get a barrel.
Really want to shoot this GT this summer.
Without going through all 12 pages, what am I needing in a new barrel?
Here’s the info I have so far.
24” 1:7.5 twist
.169 freebore
I know I’ve seen something about .118 vs .119, but I don’t know if that is the internal barrel diameter or what exactly.
Any more information from someone smarter than me, and maybe a barrel maker where I can get this done?
Thanks in advance guys.
Really want to shoot this GT this summer.
Without going through all 12 pages, what am I needing in a new barrel?
Here’s the info I have so far.
24” 1:7.5 twist
.169 freebore
I know I’ve seen something about .118 vs .119, but I don’t know if that is the internal barrel diameter or what exactly.
Any more information from someone smarter than me, and maybe a barrel maker where I can get this done?
Thanks in advance guys.
ACE barrels out of Spokane WA gets blanks out pretty quickly. I've saw groups from a few their 22 cal blanks, on a gt other a creed that were very good. They were 219 bore 6 groove barrels. They can do any twist you want within reason.
I know, old post. But do you know how this powder behaved for your buddy with temperature changes?
And what kinda barell life are you guys seeing with the 22GT?
SWLR is an excellent powder. Very temp stable.
If I could get my hands on it I would be running it in my 22 Dasher instead of H4350. Similar to RE16.
It's a great powder that nestles right in between Varget and H4350.
Barrel life is great. 2500 to 3000 rounds is very common with a good load under 3100fps.
You want a .219 bore. .218 bore is a tight-bore barrel. This will place additional stress on bullets and make it more likely to blow up bullets by pushing them too fast. The theory behind Tite bore barrels is that you generate higher pressure and get more velocity with less powder. But all I've ever seen is people just pressure up faster and not be able to push faster. I will never buy a tight bore barrel in any caliber.
Glad to read this. I bought 8 lbs on a whim but haven’t seen much load data for it with 22GT.
New to the caliber, throwing in what I’ve worked up for my first load
88 ELDM
Alpha 22 GT brass
450 CCI
34.14 gr H4350
Gives me 3063 FPS with an SD of 2.9
88 ELDM
Alpha 22 GT brass
450 CCI
34.14 gr H4350
Gives me 3063 FPS with an SD of 2.9
Dang that's a fast barrel or a very fast lot of H4350, I needed 36gr to get up to 3080.
I think it’s both. But I live in a desert climate and dehydrate my powders and usually that it speeds things up quite a bit.
I'm running 80 eldm at 3180 in a 22" with 33.2gr N150. The 88s and 90 atips have s mile of bearing surface compared to the 80s and 85.5 that I've tested. 22gt is a great lil case! So little recoil and great ballistics.
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Ya, that makes sense. I could see that. That same load went 3150'ish with 88's before it sped up. The first 100 or so rounds were with 88's. I am shooting a button rifled barrel so maybe that's also at play. Also working with dried out powder. Realistically I want to bring it down to 34.5 or 35gr. No reason to run 3200; it just shot well and I didn't want to mess with it so I shot two matches with it like that.
26" 1:7.5 twist ordered from Crownridgebarrelworks Anthony has sendero barrels in stock so i ran with it. I have alot of Shooters World Long Rlifle. And plan on using my 80gr and 88gr seconds first and then running 90gr smk or 85.5. How is Shooters World doing in the 22 GT?
Cool does it work with all bullets and i jabe seen a few using H4831SC
His turn around time is amazing. So is his barrel work.
Just posting my findings with our new 22gt build.
I’m running a 20” proof .118” bore 1:7 twist barrel on my KDE Customs m7 build. I chambered the barrel with a over sized reamer, by .002” in body diameter with a .169” fb. I increased head space by .007” to increase body length and shorten neck.
I’m working on load development using alpha brass, berger 85.5s, gm205m, and IMR 4831.
Built my own bushing in the seater die and bushings and expanded in the sizing die, running .003” neck tension.
I started with 33g and worked up to 40g.
First 33g-38g were .010 jump to lands, one round each. First rounds through the barrel.
80*f day
33g. 2640
34g. 2757
35g. 2847
36g. 2909
37g. 2971
38g. 3070
Below are .020 jump to lands, two rounds each.
85-90*f day
38g. 3066,3037
39g. 3143,3137
40g 3200,3204
Took 39g and loading three rounds each at different jump distances. Will shoot them in a ladder test sequence.
.020
.030
.040
.050
Hope to shoot this string in the morning. Will post results once finished.
I’m running a 20” proof .118” bore 1:7 twist barrel on my KDE Customs m7 build. I chambered the barrel with a over sized reamer, by .002” in body diameter with a .169” fb. I increased head space by .007” to increase body length and shorten neck.
I’m working on load development using alpha brass, berger 85.5s, gm205m, and IMR 4831.
Built my own bushing in the seater die and bushings and expanded in the sizing die, running .003” neck tension.
I started with 33g and worked up to 40g.
First 33g-38g were .010 jump to lands, one round each. First rounds through the barrel.
80*f day
33g. 2640
34g. 2757
35g. 2847
36g. 2909
37g. 2971
38g. 3070
Below are .020 jump to lands, two rounds each.
85-90*f day
38g. 3066,3037
39g. 3143,3137
40g 3200,3204
Took 39g and loading three rounds each at different jump distances. Will shoot them in a ladder test sequence.
.020
.030
.040
.050
Hope to shoot this string in the morning. Will post results once finished.
76*f this morning, felt a little unstable, hadn’t had enough coffee before shooting. .020” was definitely the best but .050” may be decent too if the flyer was me.
I didn’t put the magneto speed on barrel while checking bullet jump.
My velocity with a .020” jump was 3140 fps.
I’m loading some virgin brass up today at .015” jump and I’ll get a velocity on them and post it.
The Garmin kicks ass. Hopefully you have a chance to give up a try.
Thanks. That was just the right amount of coffee. Now I have to do it again lol.
I have noticed my groups leave a lot to be desired with any charge below about 35gr of h4350. 35 and 35.6 have produced a couple .5” 5 shots groups. It would appear most using h4350 are using ~35-37ish grains which is 1.5gr+ above the published Hodgdon data. I know lots are not seeing any pressure signs but what’s the deal with most having to shoot that much over book max?
I will say my barrel (suppressed 20” 7.5tw .219 bore) seems to be a little on the faster side given that it’s giving me about 3000fps with 34.6gr of h4350 with 88 eld’s and cci450s. Just recently got some alpha brass I’m playing with, most my info is coming from hornady brass up to this point.
Again I’m very new to this little round and so far have really liked it but it’s just got me curious.
I will say my barrel (suppressed 20” 7.5tw .219 bore) seems to be a little on the faster side given that it’s giving me about 3000fps with 34.6gr of h4350 with 88 eld’s and cci450s. Just recently got some alpha brass I’m playing with, most my info is coming from hornady brass up to this point.
Again I’m very new to this little round and so far have really liked it but it’s just got me curious.
Work up slow and look for pressure signs to tell you when. I’ve never stopped where manuals tell me to and have lived to tell the tale.
Got to shoot a few rounds today with a Garmin by my side. Not mine, but definitely getting one asap.
With virgin brass 5 shots averaging 3150 fps.
With a 320 yd zero.
At 200yds hold is 2moa down, 500yds hold is 4moa up.
Shot one round at 500 corrected for wind and shot two more. Those two were under .5moa. Went to 200 and shot two, they cut each other in a .092moa.
Hoping to get out this weekend and shoot 3 shot group at 200yd, 500yd, 800yd, and 1000yds.
So far it’s looking promising.
Ps now 38 rds down the barrel.
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All the loading manuals and data out in the world are just a starting point. The maximum load in all firearms will differ from one gun to the next. From lot to lot, for bullets, powder, barrels etc. So many variables that a book could never have a perfect load for all of them. All while the books normally stay on the safe side of pressures. The older manuals have much hotter loads then the newer printed ones. Probably for liability reasons, everyone being sue happy now days.
All loads should be started low and worked up while watching for pressure signs, working up to find the maximum load in your particular firearm.
All loads should be started low and worked up while watching for pressure signs, working up to find the maximum load in your particular firearm.
I normally start load development with .020” jump for all of the rifle cartridges.
For y'all with 22GT what seating die are you using?
I have a RCBS Matchmaster 6gt die set for sizing with a .249 bushing. but was wondering if i'll be ok with using the 6gt seating die or will have to buy a separate seating die?
I have a RCBS Matchmaster 6gt die set for sizing with a .249 bushing. but was wondering if i'll be ok with using the 6gt seating die or will have to buy a separate seating die?
SAC Ultimate Micrometer seating die.
I use a LE Wilson SS FL Bushing 6GT die with .247 bushing then 21st Century mandrel for sizing.
I just use a Forster seating die with the micrometer on top. A custom honed Forster FL die and Sinclair mandrel round it out.
The Matchmaster 6GT seater works fine, but you have to raise the ram a little to ensure the bullet falls into the case mouth if using the bullet window.
John
