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winxp_man
04-28-2010, 2:52 PM
I did search for 20 inch BB velocities and i cant seem to find good info...... anyone one that has cronoed there remmy 700 20 inch barrel and can share there info i appreciate it.... type of bullet,type of powder and amount. thanks again for info...

ar15barrels
04-28-2010, 6:38 PM
They are about the same as 20" AR-15 velocities.

Using Quickload, I can tell you that 25gr of 748 under a 69gr SMK would get you the following velocities:

16 2811
18 2891
20 2960
22 3020
24 3072
26 3119
28 3161

mydogsmonkey
04-28-2010, 7:18 PM
which caliber?

winxp_man
04-28-2010, 7:27 PM
oh crap i forgot caliber its .308

Legasat
04-28-2010, 7:45 PM
http://i6.photobucket.com/albums/y238/G2034/308barrellengthvsvelocity.jpg

Posted without permission, but hopefully he won't mind.

winxp_man
04-28-2010, 8:38 PM
Hey Randall i seen the post where you list burn rates and all kind of vel stuff on a thread for 26 or 24 in barrrles how were you able to do that and can you pm info like that thanks.....

ar15barrels
04-28-2010, 10:36 PM
Hey Randall i seen the post where you list burn rates and all kind of vel stuff on a thread for 26 or 24 in barrrles how were you able to do that and can you pm info like that thanks.....

Quickload (http://www.neconos.com/details3.htm).

Cartridge : .308 Win.
Bullet : .308, 168, Sierra HPBT MatchK 2200
Cartridge O.A.L. L6: 2.800 inch or 71.12 mm
Barrel Length : 20.0 inch or 508.0 mm

Predicted Data for Indicated Charges of the Following Powders.

Matching Maximum Pressure: 60000 psi, or 413 MPa

or a maximum loading ratio or filling of 108 %

These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

43 loads produced a Loading Ratio below user-defined minimum of 80%. These powders have been skipped.

Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
Alliant Reloder-17 103.9 48.9 3.17 2722 98.3 60000 11552 0.996 !DANGEROUS LOAD-DO NOT USE!
Winchester 760 107.1 50.9 3.30 2719 94.5 60000 11862 1.003 !DANGEROUS LOAD-DO NOT USE!
Ramshot BigGame 105.5 48.9 3.17 2716 98.6 60000 11389 1.005 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H414 104.1 49.8 3.23 2694 94.6 60000 11619 1.015 !DANGEROUS LOAD-DO NOT USE!
Hodgdon BL-C2 97.1 47.6 3.08 2694 99.5 60000 11030 1.019 !DANGEROUS LOAD-DO NOT USE!
Winchester 748 94.5 45.7 2.96 2693 99.8 60000 10635 1.012 !DANGEROUS LOAD-DO NOT USE!
IMR 3031 102.6 43.1 2.79 2689 100.0 60000 10010 1.016 !DANGEROUS LOAD-DO NOT USE!
Alliant Reloder-15 102.5 46.0 2.98 2689 98.3 60000 11069 1.019 !DANGEROUS LOAD-DO NOT USE!
Vihtavuori N550 108.0 49.6 3.21 2675 96.7 56405 11642 1.038 ! Near Maximum !
Accurate 2520 99.6 46.1 2.99 2672 100.0 60000 10368 1.030 !DANGEROUS LOAD-DO NOT USE!
IMR 4320 104.3 46.1 2.99 2672 98.6 60000 10665 1.005 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H380 103.7 47.6 3.08 2671 97.0 60000 11083 1.023 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H4895 105.1 45.7 2.96 2661 99.9 60000 10232 1.011 !DANGEROUS LOAD-DO NOT USE!
Accurate 2495 102.4 43.5 2.82 2660 100.0 60000 9874 1.052 !DANGEROUS LOAD-DO NOT USE!
Ramshot TAC 93.5 44.9 2.91 2660 99.5 60000 10449 1.019 !DANGEROUS LOAD-DO NOT USE!
Vihtavuori N540 101.9 46.3 3.00 2650 100.0 60000 10227 1.023 !DANGEROUS LOAD-DO NOT USE!
Vihtavuori N530 95.1 42.9 2.78 2650 99.5 60000 10264 1.020 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H335 89.8 44.0 2.85 2649 100.0 60000 10005 1.021 !DANGEROUS LOAD-DO NOT USE!
IMR 4895 103.6 45.0 2.92 2648 97.2 60000 10500 1.009 !DANGEROUS LOAD-DO NOT USE!
Hodgdon VARGET 104.7 45.5 2.95 2646 98.1 60000 10546 1.015 !DANGEROUS LOAD-DO NOT USE!

winxp_man
04-28-2010, 11:52 PM
oh man thats pretty nice how about for the 175 SMK and the 155 SMK .....

and thanks so much for that info.....

ar15barrels
04-29-2010, 12:01 AM
Cartridge : .308 Win.
Bullet : .308, 175, Sierra HPBT MatchK 2275
Cartridge O.A.L. L6: 2.800 inch or 71.12 mm
Barrel Length : 20.0 inch or 508.0 mm

Predicted Data for Indicated Charges of the Following Powders.

Matching Maximum Pressure: 60000 psi, or 413 MPa

or a maximum loading ratio or filling of 108 %

These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

43 loads produced a Loading Ratio below user-defined minimum of 80%. These powders have been skipped.

Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
Alliant Reloder-17 103.4 47.8 3.10 2664 98.6 60000 11246 1.016 !DANGEROUS LOAD-DO NOT USE!
Winchester 760 106.7 49.7 3.22 2661 95.0 60000 11572 1.023 !DANGEROUS LOAD-DO NOT USE!
Ramshot BigGame 105.1 47.8 3.10 2656 98.9 60000 11077 1.026 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H414 103.7 48.7 3.16 2637 95.0 60000 11334 1.035 !DANGEROUS LOAD-DO NOT USE!
Hodgdon BL-C2 96.6 46.5 3.01 2634 99.6 60000 10716 1.039 !DANGEROUS LOAD-DO NOT USE!
Winchester 748 94.1 44.6 2.89 2632 99.9 60000 10316 1.033 !DANGEROUS LOAD-DO NOT USE!
Vihtavuori N550 108.0 48.6 3.15 2629 97.2 57311 11394 1.051 ! Near Maximum !
Alliant Reloder-15 102.1 45.0 2.91 2629 98.6 60000 10767 1.040 !DANGEROUS LOAD-DO NOT USE!
IMR 3031 102.1 42.1 2.73 2626 100.0 60000 9698 1.038 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H380 103.3 46.5 3.01 2613 97.4 60000 10796 1.043 !DANGEROUS LOAD-DO NOT USE!
IMR 4320 103.9 45.1 2.92 2613 98.8 60000 10374 1.026 !DANGEROUS LOAD-DO NOT USE!
Accurate 2520 99.1 45.0 2.92 2611 100.0 60000 10047 1.051 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H4895 104.7 44.6 2.89 2600 100.0 60000 9928 1.032 !DANGEROUS LOAD-DO NOT USE!
Ramshot TAC 93.0 43.9 2.85 2599 99.7 60000 10149 1.040 !DANGEROUS LOAD-DO NOT USE!
Accurate 2495 101.9 42.5 2.75 2598 100.0 60000 9564 1.074 !DANGEROUS LOAD-DO NOT USE!
Vihtavuori N540 101.5 45.2 2.93 2590 100.0 60000 9922 1.044 !DANGEROUS LOAD-DO NOT USE!
IMR 4895 103.2 44.0 2.85 2590 97.5 60000 10225 1.030 !DANGEROUS LOAD-DO NOT USE!
Vihtavuori N530 94.7 42.0 2.72 2589 99.7 60000 9970 1.041 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H335 89.4 43.0 2.79 2588 100.0 60000 9701 1.042 !DANGEROUS LOAD-DO NOT USE!
Hodgdon VARGET 104.3 44.5 2.88 2587 98.4 60000 10267 1.035 !DANGEROUS LOAD-DO NOT USE!


Cartridge : .308 Win.
Bullet : .308, 155, Sierra HPBT Palma MK 2156
Cartridge O.A.L. L6: 2.800 inch or 71.12 mm
Barrel Length : 20.0 inch or 508.0 mm

Predicted Data for Indicated Charges of the Following Powders.

Matching Maximum Pressure: 60000 psi, or 413 MPa

or a maximum loading ratio or filling of 108 %

These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

40 loads produced a Loading Ratio below user-defined minimum of 80%. These powders have been skipped.

Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
Alliant Reloder-17 105.7 49.9 3.23 2817 97.3 60000 11741 0.962 !DANGEROUS LOAD-DO NOT USE!
Ramshot BigGame 107.6 50.0 3.24 2817 97.9 60000 11612 0.969 !DANGEROUS LOAD-DO NOT USE!
IMR 3031 105.0 44.1 2.86 2803 100.0 60000 10334 0.977 !DANGEROUS LOAD-DO NOT USE!
Winchester 748 96.5 46.7 3.03 2799 99.5 60000 10924 0.974 !DANGEROUS LOAD-DO NOT USE!
Hodgdon BL-C2 99.1 48.6 3.15 2798 98.9 60000 11288 0.981 !DANGEROUS LOAD-DO NOT USE!
Alliant Reloder-15 104.6 47.0 3.05 2790 97.5 60000 11288 0.982 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H414 106.2 50.9 3.30 2790 93.3 60000 11753 0.979 !DANGEROUS LOAD-DO NOT USE!
Accurate 2520 101.7 47.1 3.05 2779 99.8 60000 10676 0.991 !DANGEROUS LOAD-DO NOT USE!
Winchester 760 108.0 51.4 3.33 2777 92.6 57610 11832 0.985 ! Near Maximum !
Accurate 2495 104.8 44.6 2.89 2774 100.0 60000 10199 1.012 !DANGEROUS LOAD-DO NOT USE!
IMR 4320 106.4 47.1 3.05 2771 97.8 60000 10865 0.969 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H380 105.8 48.6 3.15 2769 96.0 60000 11256 0.986 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H4895 107.3 46.7 3.02 2765 99.6 60000 10501 0.973 !DANGEROUS LOAD-DO NOT USE!
Ramshot TAC 95.4 45.9 2.98 2762 99.1 60000 10696 0.982 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H335 91.7 45.0 2.92 2756 100.0 60000 10304 0.983 !DANGEROUS LOAD-DO NOT USE!
Vihtavuori N540 104.0 47.3 3.06 2755 99.9 60000 10517 0.985 !DANGEROUS LOAD-DO NOT USE!
Vihtavuori N530 97.0 43.9 2.84 2752 99.1 60000 10504 0.983 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H322 97.2 42.4 2.75 2750 100.0 60000 9905 0.980 !DANGEROUS LOAD-DO NOT USE!
IMR 4895 105.6 45.9 2.98 2746 96.2 60000 10665 0.973 !DANGEROUS LOAD-DO NOT USE!
Nitrochemie A/S 0300 88.6 40.9 2.65 2745 100.0 60000 9510 0.987 !DANGEROUS LOAD-DO NOT USE!
Hodgdon VARGET 106.7 46.4 3.01 2744 97.2 60000 10727 0.978 !DANGEROUS LOAD-DO NOT USE!

winxp_man
04-29-2010, 2:18 AM
Thanks so much Randall ;) :D