7rem 150 ABLR H1000 or Retumbo?

[Chesty Puller]

Anybody running the ABLR 150 out of the 7rem? I currently have a load developed with 69g 7828sc WLRM primer -.065 off in my Xbolt lr Hunter 2015 model 9.5 twist 26 in barrel. The load shoots well but was develped in warmer weather with average speed 3140fps (70 degree average weather then) and is now getting speeds of 3080fps (30-40 degrees). Seems to always shoot well regardless but trajectory always on the move so I want to experiment with other powders that will keep me at or above 3100fps with more stability.
I have just begun to experiment with H1000 and had a nice 3 shot group with 71.7g, Norma 4xfired brass, WLRM primer, seated -.050 off but speed not what Id like yet any thoughts on the H1000 here as far as moving up in powder slowly or experience in general?, no obvious pressure signs seen or felt.
I also have some Retumbo, however I have read it is meant more for a heavier bullet any thoughts on how this will perform with the 150 ABLR out of the 7rem? I really want to try both powders but should I? I see some data on both H1000 and Retumbo but not with this bullet. I have read a thread "150 ABLR loads" with some quickload data provided by Dr. Mike I believe wrote in 2015 for 7rem and ABLR.
Long story short just looking for some advice or experience with these powders, caliber, and ABLR 150gr. Thanks Chesty

Post in thread '150 ABLR loads' https://forum.nosler.com/threads/150-ablr-loads.31458/post-336689

 

[NYDAN]

Not exactly the same but similar:

I have a load for 150 gr. ABLR in the 7mm WSM using Reloder 23. I have seen no change in velocities due to temperature changes. See: https://forum.nosler.com/threads/loving-the-7mm-wsm-322-yard-heart-shot.46064/

I have a load for the 150 gr. CX in the 7mm RM using Reloder 26. See: https://forum.nosler.com/threads/first-two-groups-with-150-gr-cx-in-7mm-rm.48643/

Since these two powders are not available now, I am going to try Ramshot Grand next with the 150 gr. CX in the 7mm RM.

Good luck with your quest.

 

[Chesty Puller]

Not exactly the same but similar:

I have a load for 150 gr. ABLR in the 7mm WSM using Reloder 23. I have seen no change in velocities due to temperature changes. See: https://forum.nosler.com/threads/loving-the-7mm-wsm-322-yard-heart-shot.46064/

I have a load for the 150 gr. CX in the 7mm RM using Reloder 26. See: https://forum.nosler.com/threads/first-two-groups-with-150-gr-cx-in-7mm-rm.48643/

Since these two powders are not available now, I am going to try Ramshot Grand next with the 150 gr. CX in the 7mm RM.

Good luck with your quest.

Thanks Dan, good info. I want to hear how the Grand works for you with CX.

 

[Chesty Puller]

First group I loaded shot very well 71.7g h1000 but had a pretty bad deviation. Next group 72 not as good better deviation but still too slow and deviation. Actually had slower speed at the higher powder charge. I wonder if I started with too much powder to start?

 

[Blkram]

Not sure how temperature stable MagPro is, but DrMike always stated that this was the powder to use in the 7mm Rem Mag...and a quick online search provided two different answers! Yes and No.(???)
And he may have tried it with the 150 gr ABLR...I never did, as I preferred the heavier (160-165 gr) bullets in the big 7, and never got around to handloading for it.
The factory ammo I first tried shot in my new rifle back then (Rem 700 LSS) was sub-1/2MOA and never found the need to try to find a more accurate load for it. (Same goes for my 7MM STW).
But then again, I am a hunter first, and I typically am after larger species with it than deer (moose and elk), and prefer the higher energy and better penetration on these animals. I look for accuracy first, and then on-game performance. (While I have taken game as far out as 475 yards (once), my average shot distance on game over the past 38 years is just 132 yards, so while I set my goal as MOA or better, I really don't need it, but am more confident in my ability with more accurate loads for those instances where I may have to push the distance out to 400 yards on targeted game.)

You could also look at the 500 series of powders from Vithavouri, as they are supposed to be temperature stable.
A quick scan on QuickLoad shows that you should get the following velocities out of your 26" barrel (SAAMI specs - 61,000 psi) with the 150 gr ABLR, providing they do not show pressure signs in your rifle:

• MagPro: max charge of 71.8 gr for 3201 fps (for comparison)
• N555: max charge of 65.2 gr for 3132 fps
• N560: max charge of 68.8 gr for 3210 fps
• N565: max charge of 72.4 gr for 3187 fps
• N568: max charge of 76.5 gr for 3243 fps
• N570: max charge of 77.7 gr for 3282 fps

Was just reading about impacts on ES/SD on long range performance, as compared to hunting at most typical ranges; seems that the lower SDs will have an impact on bullet placement at 1000 yards. Whereas most hunters are not shooting at these distances so while we chase better SD numbers, it does not always correspond with more accurate loads in a particular rifle, and isn't an issue at shorter distances.

I take it that you are shooting at long range? And are you competing? Hunting? Just having fun trying to get a load to that next level?

 

[Chesty Puller]

Not sure how temperature stable MagPro is, but DrMike always stated that this was the powder to use in the 7mm Rem Mag...and a quick online search provided two different answers! Yes and No.(???)
And he may have tried it with the 150 gr ABLR...I never did, as I preferred the heavier (160-165 gr) bullets in the big 7, and never got around to handloading for it.
The factory ammo I first tried shot in my new rifle back then (Rem 700 LSS) was sub-1/2MOA and never found the need to try to find a more accurate load for it. (Same goes for my 7MM STW).
But then again, I am a hunter first, and I typically am after larger species with it than deer (moose and elk), and prefer the higher energy and better penetration on these animals. I look for accuracy first, and then on-game performance. (While I have taken game as far out as 475 yards (once), my average shot distance on game over the past 38 years is just 132 yards, so while I set my goal as MOA or better, I really don't need it, but am more confident in my ability with more accurate loads for those instances where I may have to push the distance out to 400 yards on targeted game.)

You could also look at the 500 series of powders from Vithavouri, as they are supposed to be temperature stable.
A quick scan on QuickLoad shows that you should get the following velocities out of your 26" barrel (SAAMI specs - 61,000 psi) with the 150 gr ABLR, providing they do not show pressure signs in your rifle:

• MagPro: max charge of 71.8 gr for 3201 fps (for comparison)
• N555: max charge of 65.2 gr for 3132 fps
• N560: max charge of 68.8 gr for 3210 fps
• N565: max charge of 72.4 gr for 3187 fps
• N568: max charge of 76.5 gr for 3243 fps
• N570: max charge of 77.7 gr for 3282 fps

Was just reading about impacts on ES/SD on long range performance, as compared to hunting at most typical ranges; seems that the lower SDs will have an impact on bullet placement at 1000 yards. Whereas most hunters are not shooting at these distances so while we chase better SD numbers, it does not always correspond with more accurate loads in a particular rifle, and isn't an issue at shorter distances.

I take it that you are shooting at long range? And are you competing? Hunting? Just having fun trying to get a load to that next level?

Thanks I do have some N560 and will try that. I will be hunting at ranges out as far as the bullet and equipment will take me, lots of clear cuts and longer shots are available these days in my neck of the woods. Not in competition and just really enjoy getting to know my rifles, practice my shooting, and reloading hunting rifles. I shoot almost everyday now that I load and just get a satifaction from going long and tight groups in hunting rigs. My goal with this rifle is .5 moa 100yards and capabilty of 1000y hunting shots, of course perfect situations, good DOPE, and practice. Actually had a shot could of taken this year at 900y on a ok buck had spotter and on camera but passed as it was evening had to work next day and knew to get to him was 5miles by rd behind gates so passed no regrets. I have a 5hd 3-15x44 leupold recently mounted on it and just love the rifle and set up. I will put up some picks soon of the rifle and results good or bad.

 

[SJB358]

I think the reason you didn’t see much difference from 71.7 and 72 is in the overall capacity of the case you’re less than about 1/2% probably even less. I’d incrementally keep creeping up in .5 grain increments. Your accuracy looks pretty good to me, so creeping up in charge weight should get you where you wanna be. 3100 and a 150 with H1000 should be no sweat.

Check out Nosler and Hodgdons for what their top speed is for a similar bullet and use their max FPS as your top end. Always a good place to be safe Chesty. Good luck and let us know how you make out.

 

[Chesty Puller]

Thursday eve range report, 4 groups all with H1000. Loaded two 5 shot groups with virgin Peterson Long Brass and CCI 250 primers each of those two groups had a large flyer but deviation better and 4 of 5 looking pretty ok. I will be going with the CCI 250 primer from here out. Not sure the reason on large flyers but possibly burrs. I had a hell of a time deburring the virgin Peterson Long brass the burrs seemed to really be hard and cutter just could not get a bite, however ran them as they needed fireformed and figured I could try a different primer in them as well. Actually sized those pieces today and were much easier to chamfer and deburr.
Also moved up in powder out of the 4x fired Norma brass. I had 7pc did a 3 shot and 4 shot group. Both poor deviation one of the 2 close to moa.
I'm thinking next trip should have some good results the seating I think is close, I also think it likes the cci 250 primer better, and will be using fresher Norma brass or Peterson Long fireformed. Thanks for the feed back.

 

[SJB358]

You look like you’re getting close to greatness.

 

[Chesty Puller]

You look like you’re getting close to greatness.

I hope you right, was hoping to get out this morning but had family stuff going today. Thanks man every bit of info helps.