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Old 03-16-2012, 10:23   #1
ladOR
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6.8 Remington SPC in 14" Contender

Brass arrived late yesterday for my S/S 6.8 Remington SPC 14" Contender, iron sights. Went up in the back and shot first two test loads today.
New Hornady Brass. 27.0 Min. charge H335, CCI 400 small rifle primer, 110 V Max, 2.302 oal. No pressure sign. But muzzle blast and sign of not completely burning powder. cull that one.
New Hornady Brass. 22.0 Grain Min. charge IMR4198, CCI 400 small rifle primer, 110 V Max, 2.302 oal. No pressure sign. Complete powder burn.
New Hornady Brass. 23.0 Grain IMR4198, CCI400 small rifle primer, 110 V Max, 2.302 oal. No presure sign. Complete powder burn.
Going to load and test last load for accuracy. Not looking for increased velocity with the first brass fire forming shot. Just making brass to fit chamber.
There was some talk of miss fires in the 6.8 Remington Contenders. A good friend of mine Bill Prator, barrel maker, head barrel maker for P. O. Ackley and gunsmith told me in the 60's. First round, the case fire forming round, in factory or wildcat cartridges should be min. charge with bullet seated at the barrel lands. Not forced into the lands with the action closing but by hand/finger loaded. This will get you a true fire formed case that fits the chamber. (Since the 6.8 Remington like other cartridges which are rimless headspace on the case it is possible for the case to be pushed into the chamber if the case is not supported for fire forming).
Next sizing is only 3/4 of the case neck. Brass/case is now perfect fit for your chamber. I rarely full length size a case. Each gun/chamber has its own supply of fodder. Then if a person wants to seat bullet deeper to load a heavier load go ahead as pressures will be less. But work up in small increments like everyone counts as it does.
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Old 03-31-2012, 08:59   #2
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I have only had my 23" s/s bull barrel in 6.8SPC to the range once been to busy to even try working up loads for it yet.

I did have a few of the so called misfires when I tried firing them a second time they all fired.

Turns out that the hammer spring may not be strong enough on G2 frames to support a steel hammer spur = I had installed a steel hammer spur.

Talking with Mike Bellm he told me to take it off and replace it with a lighter aluminum one which I have now done just need to get out and see if this made a difference if it didn't I am going to buy one of Mike's heavier # hammer springs.

Thanks for that info on fire forming I have never tried that always full length size all of my loads.
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Old 04-02-2012, 14:52   #3
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finally got 6.8 scoped. Took it up back to the bench today. Have all my brass fire formed now. Going to start working on a load and bullet weight. Have 90, 100, 110.
Sure like the burn on the IMR4198. It is burning completely.
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Old 04-03-2012, 02:36   #4
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I haven't heard much about IMR4198 in the 6.8SPC the powders that give the highest velocities with excellent accuracy are H322/RL10/AA2200...

I use H322 = max 30grs with Barnes 95gr TTSX & max 29grs with 110gr Sierra Prohunters & 110gr Barnes TSX I had a fair amount of it due to also loading my 45-70's & 223's with it but plan on trying the other powders out someday as well.
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