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20 br
I'm having a 20br made now, finally decided on a twist rate. Can any of you with 20brs give some load data with velocity for the 40 v-max,39 sierra and 50 bergers? Any help would be great. Thanks
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#2
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20BR Loading info
I will assume you have your case forming down pat!
I use only use V V N135 powder, I started off with 31grs. and got a crono reading of 4127fps. with a 39gr. sierra an thought, "hmm", that seems a little HOT so I backed off .3ths of a grain for a 30.7gr. groups were good around .260 . I tried the 40 grain V-Max and they were OK? Also tried the Nos. 40gr. and they were tad better than the V-Max. Something I should mention is that I measured loaded rounds neck diameter and the Nos. 40 grainers were .0003ths bigger? I was trying to get the best load and decided to bump the load of V V n135 to 30.8 and got a group (with 39gr, Sierra's) of .141 I thought that was good enough! Forgot to add that 30.8 of 39gr. Sierra's ave. was 4060fps. Best to ya Jack Last edited by OMJ; 06-02-2008 at 12:20 PM. Reason: added |
#3
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20BR loading
My 20BR pet load consists of:
40 grain Berger with 27.7 H4198 avg. 3,987 fps 26" x 1:11 PacNor Very accurate! Last edited by AlbertaAl; 06-02-2008 at 01:44 PM. Reason: spellign check |
#4
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6mmBR site
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#5
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Accurate Arms and Ramshot have published .20 BR loading data for some of their powders:
http://www.accuratearms.com/reloading.htm http://www.ramshot.com/powders/ |
#6
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omj,AlbertaAl: thanks for the data and info. thats the kind of info im looking for, actual date and experience with loads.
omj, I have done a lot of wildcat forming and loading just nothing this small. I already have a 243 STW, .257RUM, 6.5 RUM, 6mm-300 WSM, and 6.5 WSM. I have already got my dies and bushings from Todd Kindler at the woodchuck den. Dittohead,Mulerider, Thanks for the links, I have already seen them and just looking for actual experiences with loads and bullets that work good. I might should add that my barrel will be a Pac-Nor 3 groove with 10 twist and 27". It should be able to shoot the 50's and 40's just fine Thanks |
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