what powder next

[rob67]

thanks for this board and all the info available. I have been reading this board for 8months. I have a 10ml 2 blued with syn stock. It shoots good with 5744 42 grains to 44 with 250 xtp and 300 xtp using mmphph12 at 104yrds under 1.5 inch group every time. I tried rl7 up to 65 grains and it shoots 1.5 to 2.25 with 250 or 300 xtp and mmp. tried rcr and was not as good. I love to shoot so I would like to try another powder. rl10 and imr4198 are available without ordering. Any sugestion on what to try next. I want to use xtp bullets if possible

[rangeball]

I don't remember anyone using RL10, I'd check the load database before I used it. If I recall correctly IMR4198 is a bit slower than H4198, but still works.

[dougedwards]

Sept 27, 2010 14:25:24 GMT -5 rangeball said:

I don't remember anyone using RL10, I'd check the load database before I used it. If I recall correctly IMR4198 is a bit slower than H4198, but still works.

I think that he means Alliant Reloder 10x which is a good powder for duplex or for 300 grainers as a single. N110 would be a good powder to try next with 250 gr bullets.

Doug

[rob67]

I do mean alliant 10x. rifle seams to like the 300 grain bullets. looking for more speed than 5744.

[Chris Champion]

H4198 will give you all the speed your shoulder can handle with 300g bullets. 70g H4198 + tight fitting .458 bullet and sabot combo will hit around 2500 fps. This load will thump you though. I used to shoot .458 300g bullets with the Harvester Black Crush Rib sabot in my 50 cal Savage and speed was 2400 fps with accuracy similar to what you are getting with your 5744 loads.

[rjhans53]

not on your list but 4759 does very well for me pushing 250 xtp in a mmp sabot

[Dave W]

My gun loves 10X with the .458 300gr Rem. 10X is a double based powder so ignition might be better than IMR 4198 which has been reported to misfire on occasion.

[mountainam]

I second DaveW . I use the same combo for the same reasons along with lower pressures translating into less wear and tear on your rifle. Double base is the way to go.

[Richard]

Since you already have 5744 and H-4198 is generally easy to find, why not try duplexing. If you can get N-110 I would use it in place of 5744 but both work pretty well. They will also work with with IMR-4198 but a bit slower. The duplex is 10 gr. of either 5744 or N-110 under 60 gr. of H-4198 for an average velocity of around 2450 fps. I say "around" since the tightness of your bullet/sabot combination will influence velocity. With 110 and H-4198 my average velocity over about 30 shots is right in the 2465 fps range. This was obtained with the 300 gr. Remington .457 bullet and black Harvester crush rib sabots.
Richard

[Tarheel]

Sept 27, 2010 17:06:49 GMT -5 rjhans53 said:

not on your list but 4759 does very well for me pushing 250 xtp in a mmp sabot

X2-44grs of 4759 and the 250XTP are bad medicine for deer and shoots great in my gun.

[cuda]

I use 69grns of IMR 4198 with a Rem 300grn BCR and a Win 209 primer. I have not had any trouble at all as far as mifires or ftf. Al hooked me up with a recessed carbide BP that is top line in my book. I think it is alot better than the vent liners.

[holstonangler]

Where are you located? If you're close to east tn, I have almost a full pound of 10x sitting around i will let you try, I can't get mine to group well with it. I shoot 5744 with 300 grainers as well. I'm with the others as far as getting a duplex powder, esp when hunting in harsh conditions.

[boarhog]

Sunday, I shot 3 loads with one of my 50s.

1. 300 gr Rem, Harv Blk CR, 70 gr 10-X, CCI 209M. ES-37, AV-2151, SD-20. Only had 3 loads with me, and the first shot on a clean bore was about 4" from the next 2 shots that were about 1.75" apart. I think I prefer to duplex about 10 gr of whatever book powder you happen to have, with 60-62 gr of 10-X

2. 250 gr XTP, MMP-SB sabot, 10/62 4759/VV N-120. ES-14, AV-2553, SD-7. Appx 2.5"

3. 250 gr XTP, 44 gr A-5744, MMP-SB sabot. ES-14, AV-2055, SD-7.

I have also been comparing the two 4198s in my 45. By the time I started with the 45 Sunday, I was past tired, and had some trouble switching from the Accu-trigger 50 to Rifle Basix 45. My grouping wasn't so hot.
the load was 200 gr XTP, Harvester smooth blue sabot, 63 gr of powder.
IMR-4198, ES-32, AV-2702, SD-13. (metal can)
H-4198, ES-25, AV-2678, SD-10.
Perhaps the lots of powder I have are slightly different than those that others have tested? For two sessions now, the IMR has shot a very little bit faster, but the H has been a little more accurate.
Boarhog

[rob67]

thanks for sharing your info. i have not shot any .458 dia. bullets looks like that is a popular choice. I will get some and try rl7 again. will the orange mmp sabots work ? looks like most are using harvester. all my shooting has been in 90 to 100 degree temps. hopefully cooler weather will help

[10ga]

I use the orange MMP with the .458 X 300 gr. bullets. Really dosen't seem to matter which 300 gr. as long as .458 they shoot good in my MLII. I'm using 42 gr of 4759 and I aint gonna fix what aint broke. 10

[herman]

Since you allready have r-7 I would try 67 and 68 grs with the 250 gr bullet.one of my best groups at 300 yds was with 67 grs of r-7 and a 250 sst,I had good luck with 64 grs also.Set up 2 rifles for a fellow and his son and both of those rifles preferred the 64 grs.
10x the best it shot for me was at 75 grs and a 250 sst.But it had a real good recoil to it also.
Both these shot better for me than the 4198.
Looked for my data book to give you some fps figures but cannot find it yet.
If you're wanting to get distance as well as speed I would try the 250 sst's or even the 300 grs.