Thanks for taking the time to post these Brut. Looks like the ogive starts about 0.1" outside the case mouth if one trims their brass to 1.51". It's probably going to be quite the jump to lands running mag length.
Nosler 6.5mm 130 gr RDFs
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The beauty of the SAAMI chamber is that the first angle of shallow lands start immediately as the bullet enters the throat — so you're already "in the lands." Design goal is to reasonably accommodate the various ogive shapes of the many 6.5mm bullets.:: 6.5 GRENDEL Deer and Targets :: 6mmARC Targets and Varmints and Deer :: 22 ARC Varmints and Targets
:: I Drank the Water :: Revelation 21:6 ::
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Yes, that's the compound throat. SAAMI drawings are here on the forum and elsewhere online. I, myself, am not an expert interpreter of machinist drawings, but the way I read the SAAMI spec is that the first 0.155 of the throat, where commonly there is freebore, has a 0'30" or half-degree angle. This is the first angle of the compound throat. The second angle is a standard 1'30' or one-and-a-half degrees and continues for 0.109 until the lands reach their full height.
This assumes, of course, that your barrel maker used a SAAMI-spec reamer.:: 6.5 GRENDEL Deer and Targets :: 6mmARC Targets and Varmints and Deer :: 22 ARC Varmints and Targets
:: I Drank the Water :: Revelation 21:6 ::
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Results of the first range trip.
I decided to shoot ladders. 20 rounds total, 10 each in CFE223 and LeveRevolution. 5 each at 2.275 and 2.285. I’ll leave it up to the horde to interpret. Groups, charge weights and velocities are attached. The 2.285 results were better.
Shot from a 22” BHW chamber in .264 LBC, prone off a bipod at 200 yards.Last edited by biodsl; 01-21-2018, 01:59 PM.Paul Peloquin
Did government credibility die of Covid or with Covid?
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Originally posted by biodsl View PostResults of the first range trip.
I decided to shoot ladders. 20 rounds total, 10 each in CFE223 and LeveRevolution. 5 each at 2.275 and 2.285. I’ll leave it up to the horde to interpret. Groups, charge weights and velocities are attached. The 2.285 results were better.
Shot from a 22” BHW chamber in .264 LBC, prone off a bipod at 200 yards.Let's go Brandon!
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Originally posted by StoneHendge View PostWhat sort of speeds do you get with those powders with 123s?
@40 degrees it averages about 2500 fps
@50 degrees it's about 2544 fps
@60 degrees, 2561 fps
@90 degrees, 2661 fps
Here are some Berger 130 AR Hybrid OTM averages. Loaded @2.265 with LVR
@40 degrees, 2483 fps
@62 degrees, 2513 fps
@75 degrees 2581 fps
EDIT: I should add that factory 123 SST averaged 2510 on the same day I collected the RDF data.Last edited by biodsl; 01-21-2018, 05:03 PM.Paul Peloquin
Did government credibility die of Covid or with Covid?
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Loaded up my new N130RDFs with CFE and LVR in 0.2gr increments from 30.0 to 31.0 and went to range with Sneaky, but Magnetospeed attachment strap unraveled and crapped out when we'd barely gotten started.
To be continued. . . .:: 6.5 GRENDEL Deer and Targets :: 6mmARC Targets and Varmints and Deer :: 22 ARC Varmints and Targets
:: I Drank the Water :: Revelation 21:6 ::
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Originally posted by BluntForceTrauma View PostLoaded up my new N130RDFs with CFE and LVR in 0.2gr increments from 30.0 to 31.0 and went to range with Sneaky, but Magnetospeed attachment strap unraveled and crapped out when we'd barely gotten started.
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Originally posted by BluntForceTrauma View PostLoaded up my new N130RDFs with CFE and LVR in 0.2gr increments from 30.0 to 31.0 and went to range with Sneaky, but Magnetospeed attachment strap unraveled and crapped out when we'd barely gotten started.
Centerfire ~ Did the LVR look better than CFE or is it a wash at this point? LVR did better for me with the 130 Bergers.Paul Peloquin
Did government credibility die of Covid or with Covid?
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Originally posted by BluntForceTrauma View PostLoaded up my new N130RDFs with CFE and LVR in 0.2gr increments from 30.0 to 31.0 and went to range with Sneaky, but Magnetospeed attachment strap unraveled and crapped out when we'd barely gotten started.
To be continued. . . .
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