22GT load data

#401
Cramming to find a load for a local match on Sun. Went out this morning with 31.5 - 33.8gr of H4350 with 90gr SMK's seated .020 off.

24in barrel only getting 2930fps with 33.8gr. Only 75rds down the pipe so far... Was my MagnetoSpeed sensitivity off or is that just standard prior to getting the round count up (and barrel sped up)?

I increased the sensitivity until the rounds started registering consistently, up to Setting 5.

Don't have time for another range trip before the match so Im stuck with the data I have for now...

Thanks
Bryan
 
#402
bforney1984 said:
Cramming to find a load for a local match on Sun. Went out this morning with 31.5 - 33.8gr of H4350 with 90gr SMK's seated .020 off.

24in barrel only getting 2930fps with 33.8gr. Only 75rds down the pipe so far... Was my MagnetoSpeed sensitivity off or is that just standard prior to getting the round count up (and barrel sped up)?

I increased the sensitivity until the rounds started registering consistently, up to Setting 5.

Don't have time for another range trip before the match so Im stuck with the data I have for now...

Thanks
Bryan
Click to expand...

Soft load. You need to push 36 to 38 grains to get speed.
 
#405
4O6shootist said:
My 22br runs the 90smk at 2910 with 28.3gr varget, and is a light load. In the gt, I was at 36.3gr h4350 with 90atips jumping 25k, going right at 3100.
Click to expand...
We'll see how it goes with my BR clone tomorrow lol. Also kicking myself for grabbing a 24in barrel instead of waiting for a 26in. Only shooting steel out to 550yds tomorrow though so it should do just fine.

Much appreciated
Bryan
 
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#406
I started over this week with fresh components and I’m liking what I see so far. Alpha 22GT brass, Berger 85.5, H4350, CCI 450..
50 thou jump and 35.7gn H4350 is doing 3029 fps and I’m stacking rounds. I could play with seating depth but it’s shooting good.
I’ve gone as high as 36.4gn (3094 fps) with no pressure signs. Temp was 99 degF.
 
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#407
38 grains of triple nickel under a 90smk. Going ~3060 20” barrel 10 rounds
IMG_8566.jpeg
 
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#413
I compared the Hornady 88 ELDM to the Berger 85.5 Hybrid the other day, powder was H4350. Preliminary data shows the 85.5 is much more consistent. Previous best charge with the 88 ELDM was 35.0gr. With the 85.5, charge of 34.2 and 35.0 shot tight little .3” groups, and the other charges of 34.4, 34.6 and 34.8 were all acceptable. Same .030” off the lands, same CCI 450 primer.

More testing to follow, but the Bergers will be my match bullet and the Hornadys will be my practice bullet.
 
#414
Triggerf16 said:
I compared the Hornady 88 ELDM to the Berger 85.5 Hybrid the other day, powder was H4350. Preliminary data shows the 85.5 is much more consistent. Previous best charge with the 88 ELDM was 35.0gr. With the 85.5, charge of 34.2 and 35.0 shot tight little .3” groups, and the other charges of 34.4, 34.6 and 34.8 were all acceptable. Same .030” off the lands, same CCI 450 primer.

More testing to follow, but the Bergers will be my match bullet and the Hornadys will be my practice bullet.
Click to expand...

My experience is nearly the exact same. Hornady shot well, Bergers ran much better especially at distance.
 
#416
Not directly load data related; however, 22GT is supposed to be more barrel life-friendly than 22Creedmoor. Does anyone have any solid barrel life info yet?
 
#418
Just ordered a 7 twist for a TL3 with the .169 freebore. Planning on shooting 80.5 berger with H4350. Any real world results with that combo? Seems most are running 85-90 grain bullets here. Have a 22 creed that loves the 80.5 and 4350 was hoping to go 22 gt for a bit more barrel life and close to same performanc??
 
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#419
Dogsmack said:
Just ordered a 7 twist for a TL3 with the .169 freebore. Planning on shooting 80.5 berger with H4350. Any real world results with that combo? Seems most are running 85-90 grain bullets here. Have a 22 creed that loves the 80.5 and 4350 was hoping to go 22 gt for a bit more barrel life and close to same performanc??
Click to expand...
Curious as well. I have tons of the 80.5
 
#421
padom said:
I never shot the 80s in my 22GT but I shot a bunch of 80smk and 80 VLD in my 22BR out of a Mullerworks 1-7 and they were stupid accurate. Lights out

80smk
29.5gr H4895
3150
SD6
They were jumping a mile too
One hole @ 100yd and 0.178moa @ 400yd
Click to expand...
80 SMK is a great bullet. Was my favourite one in my 223 DTA. Extremely consistent but didn’t have the B.C. of the eld-m.
 
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#422
After having had my 22GT replaced due to the ARC CDG clearance issue, I finally found time to do some load development. Up to this point, I have been shooting 35.0gr H4350 w/ 85.5s with a total of 133 rounds on the barrel. The load was pretty inconsistent but fairly precise and accurate. Decided to move to a higher charge, ultimately higher fill %, albeit higher than I ever intended to go with this cartridge.

All I have to say is that I found money at and above 36.0. Low sample size but the barrel has been consistent at 35.0, I am confident these 36s will be consistent too. I shot two four-shot groups for each charge and the results repeated.

1694298886493.png


1694298982940.png

1694299008090.png

1694298995574.png
 
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#424
I run N555 in mine. They are close on burn rate chart. One way to find out. I would load in .5 grain increments from 36 until the case is full. See what speeds you can get and if you hit pressure. I was running 90 SMK with 37ish grains at 3175.
 
#425
Anyone running 80eldm? I'm going to use them for hunting this year. I have the 120fb chamber so 88s and 90s are dang near at base of neck touching the lands. I plan to use N555 or H4350 with them. I received the barrel a few days prior to headed to work, so need to do break in.
 
#426
4O6shootist said:
Anyone running 80eldm? I'm going to use them for hunting this year. I have the 120fb chamber so 88s and 90s are dang near at base of neck touching the lands. I plan to use N555 or H4350 with them. I received the barrel a few days prior to headed to work, so need to do break in.
Click to expand...

I didnt do any 80gr testing in 22GT but I did test 80's in my 22BR and they were stupid accurate. I tested 80smk and 80 VLD with H4895

29.5gr H4895
3152
SD 5

28" Mullerworks 1-7

400yd


K8OQDDZ.png
 
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#427
padom said:
I didnt do any 80gr testing in 22GT but I did test 80's in my 22BR and they were stupid accurate. I tested 80smk and 80 VLD with H4895

29.5gr H4895
3152
SD 5

28" Mullerworks 1-7

400yd


K8OQDDZ.png
Click to expand...
I am running a 22" 7.5tw hawkhill bow4 contour hunting rifle, I remember getting 90 atips up to 3200fps with H4350 in my first 22gt. Im hoping I can run these around 3100. Well will have to see.
 
#430
4O6shootist said:
Yup, 2 barrels. Running 28.5gr Varget 90smk at 30k jump and it shoots 1/3 moa at 3040fps, 28" 7tw 219 bore muellerworks hvy varm on an origin. I literally threw that load to break the barrel in, and that's what it does. I haven't changed anything.
Click to expand...

Same load over here same length barrel I have that same MW and also a 7.5 Bartlein. Lights out stupid accurate!
 
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#431
S3th said:
After having had my 22GT replaced due to the ARC CDG clearance issue, I finally found time to do some load development. Up to this point, I have been shooting 35.0gr H4350 w/ 85.5s with a total of 133 rounds on the barrel. The load was pretty inconsistent but fairly precise and accurate. Decided to move to a higher charge, ultimately higher fill %, albeit higher than I ever intended to go with this cartridge.

All I have to say is that I found money at and above 36.0. Low sample size but the barrel has been consistent at 35.0, I am confident these 36s will be consistent too. I shot two four-shot groups for each charge and the results repeated.

View attachment 8223732

View attachment 8223737
View attachment 8223739
View attachment 8223738
Click to expand...
Follow up to my previous 22GT post. My barrel continues to speed up after having settled on 36.4. Now at 270 round count, I am back at the drawing board because I am running at 3,300 lol...
1696766597750.jpeg
 
#432
How often are you cleaning? I notice mine speeds up about 45-50 FPS by time I get around 80-90 down the tube. I'm at 280 rounds on my PVA OBW. However I'm using RL23, not H4350. Clean is about 3000 and dirty is about 3050.
 
#434
Just cleaned my brand new barrel 24" 1:8 with .169 freebore.

Going to fireform and break this in with 25rds in the morning starting with new Alpha brass, 32gr of H4350, and Berger 85.5 LRHT.
 
#436
Just back from the range, all cleaned up.

Ran 25 rds of 32gr H4350 with an average fps so far with new Alpha brass of 2758.

Next batch will be at 33gr to continue break in.

Shoots pretty good so far, but can't wait to start load development soon.

71876130871__63E450C0-5F46-46F1-AF34-331310ACD9A6.jpegIMG_7957.jpeg
 
#439
Was able to average 2960 with 34gr of H4350 with Berger 85.5's.

Next step now that the barrel sped up and was holding speed, I'm going to try the 90gr A-Tips, and 95gr SMK's at all 35gr to start.
 
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