Upper end loads of BH209???

[smokepole50]

The literature supplied from Ramshot says that a max load is 84gr weighed or 120gr volumetric. Does anyone have any idea how much pressure this equates to with a given bullet weight?

Has anyone shot their rifle with hotter loads then 84 gr and if so did your accuracy make it worth the added cost of powder and recoil?

I would think you could take it up to 90gr, maybe even 95gr without a problem in a new ML but will the sabot hold and will the accuracy be worth it?

I guess another consideration is will you have enough barrel length to burn that extra powder and not just blow it out on the ground. I think a 27 inch barrel would probably burn up to 100 gr weighed if you used a Parker 275 bullet but I don't have a clue as to how much pressure this would generate or if the sabot would hold up to that pressure or if you could hit the broad side of a barn with the shot.

So anyone have any pressure data or experience with hotter loads???

Smokepole50

[tdillinger]

Oct 10, 2010 19:59:21 GMT -5 smokepole50 said:

The literature supplied from Ramshot says that a max load is 84gr weighed or 120gr volumetric. Does anyone have any idea how much pressure this equates to with a given bullet weight?

Has anyone shot their rifle with hotter loads then 84 gr and if so did your accuracy make it worth the added cost of powder and recoil?

I would think you could take it up to 90gr, maybe even 95gr without a problem in a new ML but will the sabot hold and will the accuracy be worth it?

I guess another consideration is will you have enough barrel length to burn that extra powder and not just blow it out on the ground. I think a 27 inch barrel would probably burn up to 100 gr weighed if you used a Parker 275 bullet but I don't have a clue as to how much pressure this would generate or if the sabot would hold up to that pressure or if you could hit the broad side of a barn with the shot.

So anyone have any pressure data or experience with hotter loads???

Smokepole50

The savage was developed with BH 209 and bh 209 can answer all your questions. I used 100 grns volume metric today in a black powder (Ovation Perdisoli)Blackhorn Powder actually used and tested this very muzzle ( my muzzle loader) loadeer with 209 setup with remington 209 primers. Its a clover leaf. Contact Don at the fallowing. [e-mail]
Don is a wonderfull man And black horn powder 209 is by far the cleanest burning powder on the market. I can shoot 15, 20 loads without running a patch andgroups are consistent. However if you are shooting a 10ml II GO SMOKELESS if you can at your area. Night and day.

[smokepole50]

My rifle is a new Accura 50 cal with Bergara barrel. It is probably as strong as a Savage ML-10 but I don't want to push the loadings without knowledge of how much pressure will be developed with the BH209.

Smokepole50

[bteague]

Smoke i think going from 84 grains by weight to 90 grains is a big jump. Work up slow.Billy

[smokepole50]

I won't even try and work up past a load of 85 gr weighed BH209 unless I can get a good group at that speed, why waste powder and lead. But I do think/feel that 90gr is probabaly a safe load, past that I would not want to guess. I guess I'll give Johan at Ramshot a call and ask for some pressure data.

Smokepole50

[rc2125]

Since getting hooked on BH209, I been running 85gr(weighed) most recently and it still puts the 270gr plat powerbelts into <1" groups @100yds, many times over, with very few that get away. The recovered sabots, from t/c shockwaves, original barnes mz's and some barnes tmz's looked like they could get pushed alot harder, compared to what they look like when really pushed from the smokeless ML's. Shot some dandy groups at 300yds, they start dropping pretty quick past 300yds though, -15moa w/100yd zero, -5moa @ 200.
Out of my new accura .50, chrono @ 12ft (so u could add maybe 13fps for true mv)
avg: 1860fps w/75gr, 1920 w/80gr, 2000 w/85gr........ so maybe 2070 w/90? Recoil is still only moderate at 85gr compared to say 150gr pellets or the like. Be sure to post if you get some good non-liability-like info from ramshot (re: max loads) pm if need be.

[rossman40]

There was something in the newer patent about 120grs (equivalent), but it is hard to read Canadian, producing around 22,000psi. Still interesting reading even being so badly written. Gives some insight on how it works.

www.freepatentsonline.com/y2009/0223611.html

[smokepole50]

The response from Ramshot is that they have not tested the BH209 past 84gr weighted or 120gr and are therefore not able to give much advice on loading pressures above that level. I did tell them I would provide them with some velocity measurements based on my rifle and various bullet sabot combinations. They were very interested in receiving any additional data I could provide them.

As I understand it based on comments with Ramshot, a 300 grain Barnes Expander MZ will generate 23,600 psi with a 84gr weighed loading. It appears, IN MY OPINION, that Ramshot attained 3 pellet velocities with this load and that is were they stopped.

Work up slowly past 85gr as the recoil starts going up fast past 86gr weighted. I don't have any velocities yet but I think 87gr might be as high as I will want to go with a factory ML.

Smokepole

[GMB54-120]

I know guys shooting upto 140gr by volume and 200gr Lehighs with no issues. Ive shot the max 120gr charge they recommend but used a Rem 50-385gr CLHPs with 54x50s sabots and the primers show no signs of an issue in my GMB54 with a Lehigh NFPJ conversion. This is actually a bit over their max recommended bullet weight with 120grs BH209 by volume.

I havent gone above the recommended max in my other Knights or my Accrua. The Accura 45 does start showing some high pressure signs with a head spaced breach plug and 110grs by volume. IMO that is more of a firing pin bushing design flaw in the Accura since my Elite 45 is fine with any heavy load ive tried.