Anyone using 69gr bullets with H4895 in there 22

S

sethperry

Active member
I picked up some 69gr tipped varmint king bullets an I have some H4895 I would like to try out in my 22GT but I can't seem to find any load data for those 2.... I have a 18" with a 8-twist alpha brass... anyone have any suggestions were you started when u seen pressure? Velocities?
I'm guessing 22-250 data should be pretty close if any one has tried it id be interested... I've seen some guys using the 69gr bullets an H4895 in their 22x47 with good results...
Im thinking I'd start around 30gr and work up from there..
but i was just curious if anyone has used this combo in there 22gt or 22-250 an if you would care to share your thoughts... TIA
 

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With that twist doesn't have to be fast... the RPM are exerting so much centrifugal force they blow up....

Bullet RPM = MV X 720/Twist Rate (in inches)

so take a 22CM load set at 3400 fps with a 1:7 Twist = 349,714 rpm
a 22-50 can achieve the same velocity of 3400fps but usually has a 1:14 Twist = 174,857 rpm

but for the 22-250 and H4198 according to Hodgdon the MV is approx 3100 maxed out
for the 22GT it's not generally recommend as it's simply too fast of a burn rate. Maybe H4350 or Win 6.5 StaBall would be best option.
Like you I've not seen much on the 22GT so really can't guide ya much on that cartridge.
 
Last edited:
Sgt_Mike said:
With that twist doesn't have to be fast... the RPM are exerting so much centrifugal force they blow up....

Bullet RPM = MV X 720/Twist Rate (in inches)

so take a 22CM load set at 3400 fps with a 1:7 Twist = 349,714 rpm
a 22-50 can achieve the same velocity of 3400fps but usually has a 1:14 Twist = 174,857 rpm

but for the 22-250 and H4198 according to Hodgdon the MV is approx 3100 maxed out
for the 22GT it's not generally recommend as it's simply too fast of a burn rate. Maybe H4350 or Win 6.5 StaBall would be best option.
Like you I've not seen much on the 22GT so really can't guide ya much on that cartridge.
Click to expand...
H4895! Not h4198 that would be pretty fast..... I'll start at 30-31gr area an work up... few guy running 22x47 / 22 parvo an 69gr bullets were getting pretty good results with 4895.. i figured it should work well in 22gt also... but there is only one way to find out!
 
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