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6.5 x 47 Lapua Match Reamers |
The 6x47 Lapua vs the 6mm XC|
6.5 x 47 Lapua Match Reamers (120-142 gr. Bullets) The 6.5 x 47 Lapua match reamers below were designed by Robert Whitley and Dave Kiff at Pacific Tool. The reamers were designed for highpower rifle competition to permit the shooting of the 120-142 gr. 6.5 mm bullets with the cartridge. The reamers have a "no neck turn" neck of .295" (about .005" over a loaded round ). The chambers were designed so that the junction of the boat tail and bearing surface of the 6.5 mm bullets are forward of the junction of the neck and shoulder of the case. In addition, the body of the case is tighter than the body of the standard CIP chamber. For those wanting to buy these reamers, or if you want something custom made to your particular requirements, call Dave Kiff at Pacific Tool (541) 826-5808. The drawing numbers of the reamers below are Pacific Tool's #9205 and #9818. Note: If you are going to shoot bullets in the 139-142 gr range you need at least a .160" free bore and you should use the reamer in drawing #9205. |
6.5 x 47 Lapua Match Reamers for 120-142 gr. bullets:
Note: The reamers below were set up as a "no neck turn" reamers for highpower rilfe competition with .005" neck clearance over a loaded round. If you are going to neck turn you should call Dave Kiff at Pacific Tool if you wish to have a neck turn reamer set up to your precise requirements.
Pacific Tool Drawing #9205 (.160" Free Bore) - If you are going to shoot bullets up in the 139-142 gr range that may include a Sierra 142 gr MatchKing or a Lapua 139 gr. Scenar or a Berger 140 gr. VLD, you need at least a .160" freebore and the drawing just below is set up to allow these bullets to be shot with their full bearing surface up in the neck of the case.
Various bullets OAL's were measured in chambered 6.5 mm barrels set up with the above 6.5 x 47 Lapua reamer (i.e. Pacific Tool & Gauge #9205 reamer with a .160" free bore and a 1 1/2 degree throat angle). Here are the findings and comments:
Note: All OAL dimensions are with the bullet touching the lands on a new chamber.
Sierra 142 - 2.757" OAL - .160" free bore ideal for this bullet, and bearing surface of bullet is all up in neck about .020" forward of the junction of the neck and shoulder.
Berger 140 VLD - 2.803" OAL - .160" free bore ideal for this bullet, and bearing surface of bullet is all up in neck about .025" forward of the junction of the neck and shoulder.
Lapua 139 - 2.740" OAL - .160" free bore ideal for this bullet, and bearing surface of bullet is all up in neck about .020" forward of the junction of the neck and shoulder.
Norma 130 VLD - 2.720" OAL - This bullet has a very long bearing surface and the free bore could be longer (.175" to .180" would be ideal) since the junction of the boat tail and bearing surface of the bullet appears to be right at the junction of the neck and shoulder of the case when the bullet touches the lands.
Berger 130 VLD (New) - 2.793" OAL - The bearing surface of this bullet is approaching 1/2 way up the neck with a .160" free bore (i.e. about .180" of bearing surface back in the neck). If you were just throating a reamer for this bullet you could shorten the free bore to about .090".
Lapua 123 - 2.741" OAL - The bearing surface of this bullet is approaching 1/2 way up the neck with a .160" free bore (i.e. about .180" of bearing surface back in the neck). If you were just throating a reamer for this bullet you could shorten the free bore to about .090".
Berger 120 BT (New Length Tolerant Bullet) - 2.674" OAL - The bearing surface of this bullet is about 1/4 of the way up the neck with a .160" free bore. If you were just throating a reamer for this bullet you could shorten the free bore to about .125".
Sierra 120 - 2.664" OAL - The bearing surface of this bullet is about 1/4 of the way up the neck with a .160" free bore. If you were just throating a reamer for this bullet you could shorten the free bore to about .125".
General comments:
If you are planning to shoot Sierra 142's, the Berger 140 VLD's or Lapua 139's and you want to have the bearing surface of the bullet all up into the neck of the case with a little room to spare, you need a minimum of the .160" free bore length for your reamer.
If you are planning on shooting only bullets like the Berger 130 VLD, the Lapua 123, the Berger 120 BT and the Sierra 120 BT, a better free bore for your reamer would probably be in the .125" range.
The 130 Norma VLD seems to be an oddball bullet (probably originally set up to be shot in a 6.5 x 55 with a real long free bore) since it seems to require the longest free bore to have all the bearing surface of the bullet up into the neck of the case, yet it is only 130 gr.
Pacific Tool Drawing #9818 (.125" Free Bore) - If you are only going to shoot bullets up to the 130 gr range that may include a Sierra 120 gr. and 123 gr. MatchKing or a Lapua 123 gr. Scenar or a Berger 130 gr. VLD, a .125" free bore should be adequate for your needs and the drawing below is set up to allow these bullets to be shot with their full bearing surface up in the neck of the case. Note: The "oddball bullet" is the Norma 130 gr VLD which has a very long bearing section and the reamer below would not be appropriate for that bullet. Even the .160" free bore of the drawing above is short for the Norma 130 gr. VLD bullet and the free bore needed for that bullet should be at least .175".
Note: The reamers below were set up as a "no neck turn" reamers for highpower rilfe competition with .005" neck clearance over a loaded round. If you are going to neck turn you should call Dave Kiff at Pacific Tool if you wish to have a neck turn reamer set up to your precise requirements.
Pacific Tool Drawing #9205 (.160" Free Bore) - If you are going to shoot bullets up in the 139-142 gr range that may include a Sierra 142 gr MatchKing or a Lapua 139 gr. Scenar or a Berger 140 gr. VLD, you need at least a .160" freebore and the drawing just below is set up to allow these bullets to be shot with their full bearing surface up in the neck of the case.
Various bullets OAL's were measured in chambered 6.5 mm barrels set up with the above 6.5 x 47 Lapua reamer (i.e. Pacific Tool & Gauge #9205 reamer with a .160" free bore and a 1 1/2 degree throat angle). Here are the findings and comments:
Note: All OAL dimensions are with the bullet touching the lands on a new chamber.
Sierra 142 - 2.757" OAL - .160" free bore ideal for this bullet, and bearing surface of bullet is all up in neck about .020" forward of the junction of the neck and shoulder.
Berger 140 VLD - 2.803" OAL - .160" free bore ideal for this bullet, and bearing surface of bullet is all up in neck about .025" forward of the junction of the neck and shoulder.
Lapua 139 - 2.740" OAL - .160" free bore ideal for this bullet, and bearing surface of bullet is all up in neck about .020" forward of the junction of the neck and shoulder.
Norma 130 VLD - 2.720" OAL - This bullet has a very long bearing surface and the free bore could be longer (.175" to .180" would be ideal) since the junction of the boat tail and bearing surface of the bullet appears to be right at the junction of the neck and shoulder of the case when the bullet touches the lands.
Berger 130 VLD (New) - 2.793" OAL - The bearing surface of this bullet is approaching 1/2 way up the neck with a .160" free bore (i.e. about .180" of bearing surface back in the neck). If you were just throating a reamer for this bullet you could shorten the free bore to about .090".
Lapua 123 - 2.741" OAL - The bearing surface of this bullet is approaching 1/2 way up the neck with a .160" free bore (i.e. about .180" of bearing surface back in the neck). If you were just throating a reamer for this bullet you could shorten the free bore to about .090".
Berger 120 BT (New Length Tolerant Bullet) - 2.674" OAL - The bearing surface of this bullet is about 1/4 of the way up the neck with a .160" free bore. If you were just throating a reamer for this bullet you could shorten the free bore to about .125".
Sierra 120 - 2.664" OAL - The bearing surface of this bullet is about 1/4 of the way up the neck with a .160" free bore. If you were just throating a reamer for this bullet you could shorten the free bore to about .125".
General comments:
If you are planning to shoot Sierra 142's, the Berger 140 VLD's or Lapua 139's and you want to have the bearing surface of the bullet all up into the neck of the case with a little room to spare, you need a minimum of the .160" free bore length for your reamer.
If you are planning on shooting only bullets like the Berger 130 VLD, the Lapua 123, the Berger 120 BT and the Sierra 120 BT, a better free bore for your reamer would probably be in the .125" range.
The 130 Norma VLD seems to be an oddball bullet (probably originally set up to be shot in a 6.5 x 55 with a real long free bore) since it seems to require the longest free bore to have all the bearing surface of the bullet up into the neck of the case, yet it is only 130 gr.
Pacific Tool Drawing #9818 (.125" Free Bore) - If you are only going to shoot bullets up to the 130 gr range that may include a Sierra 120 gr. and 123 gr. MatchKing or a Lapua 123 gr. Scenar or a Berger 130 gr. VLD, a .125" free bore should be adequate for your needs and the drawing below is set up to allow these bullets to be shot with their full bearing surface up in the neck of the case. Note: The "oddball bullet" is the Norma 130 gr VLD which has a very long bearing section and the reamer below would not be appropriate for that bullet. Even the .160" free bore of the drawing above is short for the Norma 130 gr. VLD bullet and the free bore needed for that bullet should be at least .175".
Copyright . Robert Whitley. All rights reserved.
