he loaded some up last night and tried them today best group was just under 3/4 inch at 100yds,with 40gr-vit160,still got to play about with seating depth as these were 10tho off lands,my program shows 3 kinds of 85gn spitzer with BC's of .304, .307, .315
I went with the latter
loads from 37.9gn to 44gn with 43.5gn (86%load density) of N160 pushing 3150fps being the best
but as usual you will need to work up a load for that rifle and this may have no bearing on the best load for it
3.270 comparator m8,wats 2490 in ftlb?Can you you put the COL up?
If they are Sierra 1520 at the standard COL of 2.710 they are running about 2490.
http://stevespages.com/243_2_75.html
this is wat he went by but started at 36gr upto 43gr of vit160,no pressure signs,but groups opened up after 40gr,but if there only pushing 2490 they must be under deer legal?
Looks a worry when you have highlighted 75grn and not 85grn as in the original post hope that was deliberate.[/QUOTE
its deffo a 85gr m8,its just saved like that in my favorites
Can anyone run this load through quick load,tikka t3 .243 20", 40grain-vit160 sierra 85gr spitzers,its for a mate who has just reloaded some and just wondered wat there doing thanks inadvance.......
ok i make that 1170ft/lbs seems very lowVelocity (squared)
=========== x Bullet Weight (in Grains)
450240
i.e. 1377 ft./lbs.......... mate.
3.270 comparator m8,wats 2490 in ftlb?
Velocity (squared)
=========== x Bullet Weight (in Grains)
450240
i.e. 1377 ft./lbs.......... mate.
thanks mate think ill get him to start from 40gr which are shooting ok but slow and load upto pressure signs to see if we can get speed up and grouping ok....Cartridge : .243 Win.
Bullet : .243, 85, Sierra HPBT 1530
Useable Case Capaci: 51.096 grain H2O = 3.318 cm³
Cartridge O.A.L. L6: 2.710 inch = 68.83 mm
Barrel Length : 20.0 inch = 508.0 mm
Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 52666 psi, or 363 MPa
or a maximum loading ratio or filling of 105 %
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 !
15 loads produced a Loading Ratio below user-defined minimum of 90%. 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
Vihtavuori N160 102.9 46.5 3.01 2920 93.1 52667 12434 1.048 ! Near Maximum !
it was measured from the ogive mate not point to base,hence the longness....If the COL is 3.270 the bullet is not sat in the case.
That result is joules.
It is about 1017ftlbs.
If the COL is 3.270 the bullet is not sat in the case.
That result is joules.
It is about 1017ftlbs.
handy link thanks mate.........Sorry, but you're both wrong. I've been using this formula for years. There is an on-line calculator you can check:-
http://www.larrywillis.com/bullet-energy.html
Sorry, but you're both wrong. I've been using this formula for years. There is an on-line calculator you can check:-
http://www.larrywillis.com/bullet-energy.html
it was measured from the ogive mate not point to base,hence the longness....