30BR Repeater in 700SA Footprint

[RGRobinett]

No, it wouldn't. In fact, the 125 SST may be marginal. Plugging in the bullet length, twist and MV into Ballistic AE, it gives me Miller Stability of .98. Way low, but I don't know how the plastic tip affects that number. I'll test it more & decide. I may end up shooting BIB 118s.

I did shoot 5 more 125gr SSTs with 34.0gr H4198 over the MagnetoSpeed today. Discarding the 1st shot (clean bore) it averaged 2,856 FPS with an 8.6 SD. I'm impressed with the speed in such a short barrel (16.1").

For FB HP bullets, and polymer (0r other material) tipped bullets, the Miller calculator is nowhere close. Go to JBM and use this one: < http://www.jbmballistics.com/cgi-bin/jbmdrag-5.1.cgi >
Left-hand menu, open calculations; about 1/2 way down page, under Ballistic Coefficient Calculation and Conversion; open DRAG/TWIST - that calculator is, "money in the bank" . . . for everything! AND, the results correlate nicely with the Tioga Engineering Bullet Design, and if still there, a free down-loadable program on Dan Lilja's web-page: < riflebarrels.com >.RG

 

[X-Caveman]

Thanks, Randy. I suspected something awry. Your 118-10 is only .015” shorter than the SST & I know a 17tw is overkill for them. On another note- have u ever shot deer/ hog sized game with your 118s? It’s hard for me to ignore the extra velocity and accuracy that I can get out of them. There’s just so much more room for powder with your bullets vs the 125SST.

 

[troupe]

Great choice on the Razor. I have used them for years on my AR's. They are heavy, but hold up great. Great glass and reticle.

 

[RGRobinett]

Thanks, Randy. I suspected something awry. Your 118-10 is only .015” shorter than the SST & I know a 17tw is overkill for them. On another note- have u ever shot deer/ hog sized game with your 118s? It’s hard for me to ignore the extra velocity and accuracy that I can get out of them. There’s just so much more room for powder with your bullets vs the 125SST.

For critters up to the size of LARGE mule deer, the 118s should work great - at 450yd, remaining energy (ft-lb) will be about 950; at 400 better than 1050 ft-lb - and way more frontal area than a 6mm - inside that distance, they have been used to kill many deer DRT - think SE states where the limit is as many as one deer per day. RG

 

[X-Caveman]

For those unfamiliar with the TX hog problem. This is what I want to try it on 1st.

 

[P1ZombieKiller]

View attachment 1173499
View attachment 1173500

For those unfamiliar with the TX hog problem. This is what I want to try it on 1st.

I hope you smoke everyone of them.

 

[Sniper338]

Picked it up today. Thanks, Johnny @ Crimson Accuracy. With suppressor, scope, magazine & 5 rounds it weighed in at 9# 3oz. Can’t wait to shot it. View attachment 1167406

Johnnys built several of my guns. He does a fabulous job.

 

[Sniper338]

Oops.... damn fat fingers. I meant 2850. Sorry...

I read that and was think sob whats he doing to get that!!!!!

 

[X-Caveman]

Great choice on the Razor. I have used them for years on my AR's. They are heavy, but hold up great. Great glass and reticle.

I can't say enough good things about Vortex's customer service, too. I was really struggling with that little 1-4x24 PST that I had on it originally. I just thought the glass didn't suit me. When I got the Razor & pulled the PST, I noticed what appeared to be a more than superficial ring mark - like the tube itself was damaged. Without even contacting them or getting a RMA, I shipped it in. I included a note detailing what I thought may be issues. Within a week they contacted me saying that it couldn't be repaired. That was an obsolete model, but they'll ship me a brand new PST Gen II 1-6x24! I offered to send them a little $, as that's more scope than the original. They declined my offer, but included a Vortex T-shirt. It's back ordered for a few weeks, but I'll have it before too long. Then a new dilemma - what to do with i?. I'd feel dirty selling it. Maybe I'll build another AR...

 

[Evan]

Then a new dilemma - what to do with i?.

A scope without a rifle is a terrible thing! Do you have a 6.5 Grendel AR yet? I've heard the 123SST is pretty good medicine for pig-shaped rodents!

 

[X-Caveman]

A scope without a rifle is a terrible thing! Do you have a 6.5 Grendel AR yet? I've heard the 123SST is pretty good medicine for pig-shaped rodents!

No. Just 5.56 & 300BLK. My interest in ARs fell off quite a bit once I started shooting/ competing in BR. Now that's temporarily unavailable, I've been enjoying plinking with the black rifles & other types of bolt guns that weigh less than 17#. It's almost therapeutic loading ammo by the hundreds with thrown charges, being satisfied if you find at least half of your brass, cleaning every 500 rounds or so whether it needs it or not.

I do have a spare lower I could build something on... It would be nice to have a gas gun with a little more starch for piggies...

 

[Dusty Stevens]

No. Just 5.56 & 300BLK. My interest in ARs fell off quite a bit once I started shooting/ competing in BR. Now that's temporarily unavailable, I've been enjoying plinking with the black rifles & other types of bolt guns that weigh less than 17#. It's almost therapeutic loading ammo by the hundreds with thrown charges, being satisfied if you find at least half of your brass, cleaning every 500 rounds or so whether it needs it or not.

I do have a spare lower I could build something on... It would be nice to have a gas gun with a little more starch for piggies...

Get one of those fancy 45-50cal versions. Real pig medicine

 

[X-Caveman]

I took it out today with my 9yr old daughter and one of her friends. Wouldn’t you know it, we rolled up on 4 sleeping hogs and I didn’t have it at the ready.

This thing is an absolute hoot. I’m really liking the 30BR with the short barrel. I shot 6 rounds over the magnetospeed again today - again off a bag of corn resting on Polaris tailgate with 2 girls trying their best to be still...

125 SST, 34.2gr 4198
- 2,848
-2,854

118-10 BIB, 34.7gr
-2,900
-2,902

118 BIB, 35.0gr
- 2,922
- 2,914

conditions were good - low humidity, sun, about 5 MPH from my 4:30. Held the 500yard hash mark on the dot the best I could. Dot is just out of the pic.

 

[X-Caveman]

My helpers & my new favorite toy

I also tested my new MDT 12 round mag. I ran it once with 11 rounds and once with 6. Worked perfectly. I was a little worried, but today it was smooth as silk.

 

[P1ZombieKiller]

Now you got me.wanting one of these

 

[P1ZombieKiller]

I took it out today with my 9yr old daughter and one of her friends. Wouldn’t you know it, we rolled up on 4 sleeping hogs and I didn’t have it at the ready.

This thing is an absolute hoot. I’m really liking the 30BR with the short barrel. I shot 6 rounds over the magnetospeed again today - again off a bag of corn resting on Polaris tailgate with 2 girls trying their best to be still...

125 SST, 34.2gr 4198
- 2,848
-2,854

118-10 BIB, 34.7gr
-2,900
-2,902

118 BIB, 35.0gr
- 2,922
- 2,914

conditions were good - low humidity, sun, about 5 MPH from my 4:30. Held the 500yard hash mark on the dot the best I could. Dot is just out of the pic.
View attachment 1175817

@RGRobinett can you run the energy on those 118's running at 2900 fps versus a 150 grain running at 2100 fps?

Got me thinking too much again.

 

[X-Caveman]

About 2,215 ft-lbs for the 118 at 2,900 vs 1,478 ft-lbs for the 150 at 2,100. If anyone should do this you should, Wes!

 

[RGRobinett]

@RGRobinett can you run the energy on those 118's running at 2900 fps versus a 150 grain running at 2100 fps?

Got me thinking too much again.

Wes, the big difference, of course, is sectional density, which will affect penetration. To elaborate on the energy, these numbers were calculated for STD conditions, @ 1,000 ft elevation. Remaining lb ft energy, for your MVs, at 200; 300; 400; 500yd; 1) 118 gr: 1482; 1199; 461; 763
2) 150 gr: 1029; 856; 710; 591
I must admit, I was surprised. The relative drops, in inches/MOA, presuming a 200yd zero:
1) 118gr, -6.8/2.2; 20.4/4.9; 42.5/8.1
2) 150gr, -15/4.8; 43.6/10.4; 83.5/16.9
I'm even more surprised! RG

 

[X-Caveman]

This is the Reticle in my Razor Gen IIe. It subtends properly at 6x. It's supposed to be for 5.56 zeroed at 200 yards. I played with the zero distance & have it working on the $ out to 500 yards with both Randy's 118 and the 125SST - good enough! I think it's about a 225 yard zero, which puts it about 2" high at 100 yards. Anything out to about 250 is point and shoot. First hash mark for 300 yards, second for 400, third for 500 & bottom for 600. The width of the hashes are for ranging 9" targets. I don't know how useful that will be, but them being progressively smaller sure makes it fast and easy. I may never touch the dials again. Plus, the illuminated dot is almost too darn bright - daylight bright x10.

 

[X-Caveman]

Wes, the big difference, of course, is sectional density, which will affect penetration. To elaborate on the energy, these numbers were calculated for STD conditions, @ 1,000 ft elevation. Remaining lb ft energy, for your MVs, at 200; 300; 400; 500yd; 1) 118 gr: 1482; 1199; 461; 763
2) 150 gr: 1029; 856; 710; 591
I must admit, I was surprised. The relative drops, in inches/MOA, presuming a 200yd zero:
1) 118gr, -6.8/2.2; 20.4/4.9; 42.5/8.1
2) 150gr, -15/4.8; 43.6/10.4; 83.5/16.9
I'm even more surprised! RG

If you want to look flat, hang out with rainbows!